diff --git a/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb b/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb
index 59fba3d..92953c0 100644
Binary files a/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb and b/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb differ
diff --git a/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb-shm b/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb-shm
index be06262..fe9ac28 100644
Binary files a/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb-shm and b/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb-shm differ
diff --git a/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb-wal b/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb-wal
index 6a5cabd..e69de29 100644
Binary files a/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb-wal and b/DerivedData/filesys/Index/Debug/macosx10.12-x86_64/filesys.xcindex/db.xcindexdb-wal differ
diff --git a/filesys/ID.c b/filesys/ID.c
index e9dbb6a..59f50bd 100644
--- a/filesys/ID.c
+++ b/filesys/ID.c
@@ -9,6 +9,9 @@
 #include "ID.h"
 
 long get_id(void){
-    srand((unsigned int)time(NULL));
     return (long)(rand()+rand()%1000);
 }
+
+void init_id(void){
+    srand((unsigned int)time(NULL));
+}
diff --git a/filesys/ID.h b/filesys/ID.h
index c1a6c85..6951c47 100644
--- a/filesys/ID.h
+++ b/filesys/ID.h
@@ -14,5 +14,6 @@
 #include <time.h>
 
 extern long get_id(void);
+extern void init_id(void);
 
 #endif /* ID_h */
diff --git a/filesys/List.c b/filesys/List.c
index 9a86214..cef1154 100644
--- a/filesys/List.c
+++ b/filesys/List.c
@@ -10,6 +10,8 @@
 #include "Debug.h"
 #include "ID.h"
 
+List *items_bin = NULL;
+
 List *build_list(void){
     List *p_list = (List *) malloc(sizeof(List));
     p_list->avaliable = 1;
@@ -65,6 +67,8 @@ int del_node(List *p_list, Node *p_node){
 }
 
 int free_node(Node *p_node){
+    p_node->avaliable = -1;
+    p_node->safe = -1;
     free(p_node ->value);
     free(p_node);
     return 0;
@@ -148,12 +152,12 @@ int free_list(List *p_list){
     while (p_node != NULL){
         pl_node = p_node;
         p_node = p_node->n_node;
-        pl_node->avaliable = 0;
-        pl_node->safe = 0;
+        pl_node->avaliable = -1;
+        pl_node->safe = -1;
         free_node(pl_node);
     }
-    p_list->avaliable = 0;
-    p_list->safe = 0;
+    p_list->avaliable = -1;
+    p_list->safe = -1;
     free(p_list);
     return 0;
 }
@@ -216,39 +220,75 @@ char *set_valuestring(char *string){
     return p_string;
 }
 
-int list_tofile(FILE *p_file, List *p_list){
-    //fprintf(p_file, "%d,%d,");
+int table_tofile(FILE *p_file, Table *p_table){
+    fprintf(p_file, "!#TABLE_INFO\n");
+    fprintf(p_file, "id:%ld\n",p_table->id);
+    fprintf(p_file, "item_num:%d\n",p_table->num);
+    fprintf(p_file, "define_id:%ld\n", p_table->p_define->id);
+    Node *pi_node = p_table->item_list->h_node;
+    Item *p_item = (Item *)pi_node->value;
+    fprintf(p_file, "\n");
+    fprintf(p_file, "!#ITEM_INFO\n");
+    while (pi_node != NULL){
+        p_item = (Item *)pi_node->value;
+        fprintf(p_file, "id:%ld\n",p_item->id);
+        fprintf(p_file, "data_num:%d\n",p_item->data_num);
+        fprintf(p_file, "define_id:%ld\n",p_item->p_define->id);
+        Node *pt_node = p_item->p_define->type_list->h_node;
+        Node *pd_node = p_item->data_list->h_node;
+        for (int i = 0; i < (p_item->p_define->num); i++){
+            if (!strcmp((char *)pt_node->value, "int")){
+                fprintf(p_file, "value[%d]:%d\n",i,*((int *)pd_node->value));
+            }
+            else if(!strcmp((char *)pt_node->value, "string")){
+                fprintf(p_file, "value[%d]:%s\n",i,((char *)pd_node->value));
+            }
+            else if(!strcmp((char *)pt_node->value, "float")){
+                fprintf(p_file, "value[%d]:%lf\n",i,*((double *)pd_node->value));
+            }
+            else{
+                fprintf(p_file, "vlaue[%d]:not_avaliable\n",i);
+            }
+            pt_node = pt_node->n_node;
+            pd_node = pd_node->n_node;
+        }
+        fprintf(p_file, "END\n");
+        pi_node = pi_node->n_node;
+    }
     return 0;
 }
 
-Item *build_item(void){
+Item *build_item(Define *p_define){
     Item *p_item = (Item *)malloc(sizeof(Item));
     p_item->id = get_id();
     p_item->data_list = build_list();
     p_item->data_num = 0;
-    p_item->type_list = build_list();
-    p_item->define_list = build_list();
-    p_item->define_num = 0;
+    p_item->p_define = p_define;
     p_item->avaliable = 1;
     p_item->safe = 1;
+    Node *p_node = build_node();
+    p_node->value = p_item;
+    add_node(items_bin,p_node);
     return p_item;
 }
 
-int add_define(Item *p_item, char *define, char *type){
+int add_define(Define *p_define, char *define, char *type){
     Node *pd_node = build_node();
     pd_node->value = set_valuestring(define);
     
     Node *pt_node = build_node();
     pt_node->value = set_valuestring(type);
     
-    add_node(p_item->define_list, pd_node);
-    add_node(p_item->type_list, pt_node);
-    p_item->define_num++;
+    add_node(p_define->define_list, pd_node);
+    add_node(p_define->type_list, pt_node);
+    p_define->num++;
     return 0;
 }
 
+
+
 int add_data(Item *p_item, void *value){
-    if (p_item->data_num >= p_item->define_num){
+    if (p_item->data_num >= p_item->p_define->num){
         DEBUG_CREATE_INFO *t_deg_crt_ifo = get_degcrtifo();;
         t_deg_crt_ifo->type = ERROR;
         t_deg_crt_ifo->showvar = 1;
@@ -256,7 +296,100 @@ int add_data(Item *p_item, void *value){
         t_deg_crt_ifo->message = "data is more than define.";
         debug_printf(t_deg_crt_ifo);
     }
+    Node *p_node = build_node();
+    p_node->value = value;
+    add_node(p_item->data_list, p_node);
+    p_item->data_num++;
     return 0;
 }
 
+Define *build_define(void){
+    Define *p_define = (Define *) malloc(sizeof(Define));
+    p_define->id = get_id();
+    p_define->num = 0;
+    p_define->define_list = build_list();
+    p_define->type_list = build_list();
+    p_define->avaliable = 1;
+    p_define->safe = 1;
+    return p_define;
+}
 
+int free_define(Define *p_define){
+    free_list(p_define->define_list);
+    free_list(p_define->type_list);
+    p_define->avaliable = -1;
+    p_define->safe = -1;
+    free(p_define);
+    return 0;
+}
+
+int free_item(Item *p_item){
+    p_item->avaliable = -1;
+    p_item->safe = -1;
+    free_list(p_item->data_list);
+    free(p_item);
+    return 0;
+}
+
+Table *build_table(Define *p_define){
+    Table *p_table = (Table *)malloc(sizeof(Table));
+    p_table->id = get_id();
+    p_table->item_list = build_list();
+    p_table->p_define = p_define;
+    p_table->avaliable = 1;
+    p_table->safe = 1;
+    return p_table;
+}
+
+int add_item(Table *p_table, Item *p_item){
+    if(p_item->p_define->id != p_table->p_define->id){
+        DEBUG_CREATE_INFO *t_deg_crt_ifo = get_degcrtifo();;
+        t_deg_crt_ifo->type = ERROR;
+        t_deg_crt_ifo->showvar = 1;
+        t_deg_crt_ifo->variable = &p_item;
+        t_deg_crt_ifo->message = "item's define is different form the table's.";
+        debug_printf(t_deg_crt_ifo);
+    }
+    Node *p_node = build_node();
+    p_node->value = p_item;
+    add_node(p_table->item_list,p_node);
+    p_table->num++;
+    return 0;
+}
+
+int free_table(Table *p_table){
+    free_list(p_table->item_list);
+    p_table->avaliable = -1;
+    p_table->safe = -1;
+    free(p_table);
+    return 0;
+}
+
+void list_init(void){
+    items_bin = build_list();
+}
+
+void list_delinit(void){
+    Node *p_node = items_bin->h_node;
+    while (p_node != NULL){
+        Item *p_item = (Item *)p_node->value;
+        if (p_item->avaliable == 1){
+            free_item(p_item);
+        }
+        p_node = p_node->n_node;
+    }
+    free_list(items_bin);
+}
+
+int define_tofile(FILE *p_file, Define *p_define){
+    fprintf(p_file, "!#define\n");
+    fprintf(p_file, "id:%ld\n",p_define->id);
+    Node *pd_node = p_define->define_list->h_node, *pt_node = p_define->type_list->h_node;
+    for (int i = 0 ; i < p_define->num; i++){
+        fprintf(p_file, "%s/%s\n",(char *)pd_node->value, (char *)pt_node->value);
+        pd_node = pd_node->n_node;
+        pt_node = pt_node->n_node;
+    }
+    fprintf(p_file, "END");
+    return 0;
+}
diff --git a/filesys/List.h b/filesys/List.h
index e024733..5975ced 100644
--- a/filesys/List.h
+++ b/filesys/List.h
@@ -47,11 +47,8 @@ typedef struct item{
     int avaliable;
     int safe;
     Define *p_define;
-    List *define_list;
-    List *type_list;
     List *data_list;
     int data_num;
-    int define_num;
 } Item;
 
 typedef struct table{
@@ -70,6 +67,8 @@ typedef struct bin{
     List *item_list;
 } Bin;
 
+extern List *items_bin;
+
 extern List *build_list(void);
 extern Node *build_node(void);
 extern int free_list(List *);
@@ -83,8 +82,9 @@ extern Node *get_locationByid(List *,long);
 
 extern Node *get_locationBystring(List *, char *);
 
-extern int list_tofile(FILE *, List *);
-extern int file_tolist(FILE *, List *);
+extern int table_tofile(FILE *p_file, Table *p_table);
+extern int define_tofile(FILE *p_file, Define *p_define);
+extern int file_totable(FILE *, List *);
 
 extern int  *set_valueint(int);
 extern double *set_valuefloat(double);
@@ -98,5 +98,12 @@ extern Define *build_define(void);
 extern int add_define(Define *, char *, char *);
 extern int free_define(Define *);
 
+extern Table *build_table(Define *p_define);
+extern int add_item(Table*, Item *);
+extern int free_table(Table *);
+
+extern void list_init(void);
+extern void list_delinit(void);
+
 
 #endif /* List_h */
diff --git a/filesys/main.c b/filesys/main.c
index 6e14a45..6d2c46a 100644
--- a/filesys/main.c
+++ b/filesys/main.c
@@ -1,18 +1,48 @@
 
 #include "Support.h"
+#include <time.h>
 
 
 int main(int argc, char *argv[]){
-    Node *nl[50];
-    List *pl = build_list();
-    for(int i = 0; i < 50; i++){
-        nl[i] = build_node();
-        nl[i]->value = (void *)set_valueint(i);
-        add_node(pl, nl[i]);
-    }
+    list_init();
+    init_id();
+    Define *p_define = build_define();
+    add_define(p_define, "Name", "string");
+    add_define(p_define, "Age", "int");
+    add_define(p_define, "Power", "float");
+    Table *p_table = build_table(p_define);
+    Item *items[3];
+    
+    items[0] = build_item(p_define);
+    add_data(items[0], set_valuestring("Tim"));
+    add_data(items[0], set_valueint(23));
+    add_data(items[0], set_valuefloat(100.0));
+    add_item(p_table, items[0]);
+    
+    items[1] = build_item(p_define);
+    add_data(items[1], set_valuestring("Pat"));
+     add_data(items[1], set_valueint(33));
+    add_data(items[1], set_valuefloat(120.0));
+    add_item(p_table, items[1]);
+    
+    items[2] = build_item(p_define);
+    add_data(items[2], set_valuestring("Tom"));
+    add_data(items[2], set_valueint(43));
+    add_data(items[2], set_valuefloat(130.0));
+    add_item(p_table, items[2]);
+    
+    FILE *fp = fopen("table.data", "w");
+    table_tofile(fp, p_table);
+    fclose(fp);
+    
+    FILE *dfp = fopen("define.settings", "w");
+    define_tofile(dfp, p_define);
+    fclose(dfp);
+    
+    free_define(p_define);
+    free_table(p_table);
+    //list_delinit();
     
-    Node *p_node = get_locationByindex(pl, 5);
-    free_list(pl);
     return 0;
 }