diff --git a/README.md b/README.md
index 4c12041..72f7eca 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,21 @@ A lightweight, standalone email gateway service written in Go. It provides a sim
 - **Configurable**: extensive configuration via `config.yaml`, environment variables, or command-line flags.
 - **Single Binary**: Easy to deploy with no external runtime dependencies.
 
+## Architecture
+
+### System Architecture
+The service acts as a lightweight middleware between your applications and SMTP providers.
+1. **API Layer**: Exposes a RESTful interface using Gin Gonic.
+2. **Auth Layer**: Validates requests via Bearer Token.
+3. **Service Layer**: Handles email composition and attachment processing.
+4. **Integration**: Communicates with external SMTP servers to deliver messages.
+
+### Technical Stack
+- **Language**: [Go](https://go.dev/) (1.18+)
+- **Web Framework**: [Gin Gonic](https://gin-gonic.com/)
+- **Email Client**: [Gomail](https://github.com/go-gomail/gomail)
+- **Config Management**: YAML & Environment Variables
+
 ### Getting Started
 
 #### Prerequisites
diff --git a/README_CN.md b/README_CN.md
index bd94a4d..bf40d4e 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -18,6 +18,21 @@
 - **灵活配置**: 支持 `config.yaml`、环境变量或命令行参数配置。
 - **单文件部署**: 编译为单个二进制文件，无外部运行时依赖。
 
+## 架构说明
+
+### 系统架构
+本服务作为一个轻量级中间件，连接您的应用与 SMTP 服务商。
+1. **API 层**: 使用 Gin Gonic 提供的 RESTful 接口。
+2. **认证层**: 通过 Bearer Token 进行请求验证。
+3. **服务层**: 负责邮件内容的构建及附件处理。
+4. **集成层**: 与外部 SMTP 服务器通信，完成最终投递。
+
+### 技术栈
+- **核心语言**: [Go](https://go.dev/) (1.18+)
+- **Web 框架**: [Gin Gonic](https://gin-gonic.com/)
+- **邮件库**: [Gomail](https://github.com/go-gomail/gomail)
+- **配置管理**: YAML 与 环境变量
+
 ### 快速开始
 
 #### 前置要求