fix: update system requirement

1 files changed, 56 insertions, 0 deletions

diff --git a/README.md b/README.md
index b3cc1fef..94cc9f8a 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,7 @@ GpgFrontend is **PERMANENTLY FREE**, but you can also "DONATE" it through STAR t
 
 - [Usage](#usage)
 - [User Manual](#user-manual)
+- [System Requirement](#system-requirement)
 - [Developer Document](#developer-document)
 - [Build From Source Code](#build-from-source-code)
 - [Languages Support](#languages-support)
@@ -69,6 +70,61 @@ What about files?
 GpgFrontend provides documentations on its main features. If you want to know how to install, please
 read the [User Manual](https://www.gpgfrontend.bktus.com/#/quick-start) instead of README.
 
+## System Requirement
+
+Before proceeding with the installation and usage of GpgFrontend, it's crucial
+to understand the system requirements that ensure optimal performance. This
+section provides comprehensive details about the necessary software
+dependencies, hardware specifications, and the compatible operating systems.
+Meeting these requirements will ensure a smooth, efficient experience while
+using GpgFrontend.
+
+Please read the following subsections carefully to confirm that your system
+aligns with the recommended configurations.
+
+### Operating System
+
+GpgFrontend is compatible with major operating systems including Linux, macOS,
+and Windows. Specifically, it requires Windows 10 and later, macOS 10.15 High
+Sierra and later, and Ubuntu 18.04 LTS or other equivalent Linux distributions.
+
+### Software Dependencies
+
+Qt5 or Later: GpgFrontend is developed using the Qt framework. Therefore, a
+runtime of Qt5 or later is required for the software to function correctly.
+Please note, the Qt5 runtime is integrated into the Release Package for Linux,
+macOS, and Windows, so it generally does not need to be considered separately.
+This allows for easier setup and ensures compatibility across different systems.
+
+GnuPG: As the frontend for GnuPG, GpgFrontend requires GnuPG (version 2.2.0 or
+higher) to be pre-installed in your system. Please note, GpgFrontend is not
+compatible with GnuPG 1.x versions. Users employing earlier versions of GnuPG 2
+may encounter some unforeseen issues. We strongly recommend updating to the
+supported versions to ensure a seamless experience.
+
+### Hardware
+
+While the specific hardware requirements largely depend on the size and
+complexity of the data you're working with, we generally recommend:
+
+A computer with at least 1 GB of RAM. However, 2 GB or more is preferable for
+smoother performance. The majority of these resources are allocated to your
+operating system, but around 100 MB of memory is needed to ensure the smooth
+running of GpgFrontend. At least 200 MB of free disk space for software
+installation. Additional space will be needed for ongoing work.
+
+Please note, these requirements are intended to be guidelines rather than strict
+rules. It's possible that GpgFrontend will work on lower-spec hardware, but for
+optimal performance, the above specifications are recommended.
+
+### Network
+
+Although not necessary for basic operation, an active Internet connection may be
+required for software updates and accessing online help resources.
+
+Please note that these are the minimal requirements that we tested, and actual
+requirements for your use case could be higher, especially for large datasets.
+
 ## Developer Document
 
 You can view the developer documentations that is synchronized with the current latest develop code. This document will