智能家居，通常将其定义为利用中央控制单元，通过不同的通信网络连接和相应的控制布线，将与家居生活相关的各种生活设施和设备连接在一起，通过一定的机制和相应的终端对其进行智能化控制。智能家居系统可为我们的生活带来诸多的便利，极大地提升我们的生活质量，但现阶段却普遍存在着造价昂贵、实用性差等问题，为智能家居的普及应用带来一定的困难。因此，在国内外方兴未艾的智能家居研究热潮中，研究重点之一就是设计开发便于普及应用的智能家居系统，使其具有低成本、易于使用等特点。 本文通过对国内外现有智能家居系统的研究分析，结合国内应用需求特点，提出一种简单实用的智能家居系统框架原型，将智能家居系统划分为控制对象、集中控制器和用户操作终端三大部分，并采用嵌入式设计技术，重点完成了集中控制单元的软硬件设计和操作终端上部分功能的软件设计。 首先，针对应用特点，选用S3C2440A处理器芯片，扩展DM9000网卡芯片等外围电路，设计了一个稳定运行的嵌入式微处理控制单元，作为智能家居的集中控制器。其次，使用Linux操作系统，充分利用其开源性和良好的拓展性，完成了智能家居控制器的软件环境开发，为后续智能家居操作、控制功能的实现奠定了基础。在控制软件的开发过程中，基于Linux底层开发了QT界面，为智能家居系统提供良好的交互功能。在智能家居各个设备之间的连接方面，简单易得的连通介质是设计低成本智能家居控制系统的关键。因此，利用家庭中已普遍应用的Wifi作为设备之间通信的互联介质，利用Web控制的方法实现网页对相关设备的控制。同时，由于网页的调用通过相应的浏览器即可实现，因此这就带来了操作方面的跨平台特性，也带来了相对低廉的成本、易于上手的操作和不限于固定操作系统平台等优点，将能够较为理想地完善整个智能家居控制系统之间的通信与控制。最后，通过红外电路接口做为辅助，为不能使用Wifi和移动互联设备的家庭成员提供简单的控制方式，以此实现对上述智能家居控制系统在操作上的补充。 基于上述软硬件的设计，构建了一款基于Wifi通信及Web控制的智能家居控制系统，并完成了一些功能模块的连通调试，达到了预期的设计目标，其具有低成本、易操 作和跨平台控制等特点。

Smart home controls the various living facilities and equipments related to our life by making use of central control unit and connects them through the different communication networks and the corresponding control wiring. And they are controlled intelligently through certain mechanism and corresponding terminal. Smart home system can bring lots of convenience to our life, greatly improving our quality of life. But the popularization and application of the smart home system is difficult for the season of their problems of expensive and impractical. Therefore, one of the main research of the smart home system is the design and development of it with the characteristics of low cost and easy to use. In this paper, a kind of simple and practical smart home system prototype is put forward through the analysis and research on the existing domestic and foreign smart home system, combined with the characteristics of the application of domestic demand. It divides smart home system into 3 parts, such as the control object, the centralized controller and the user terminal. The key work is to complete the software design and hardware design of the centralized controller and part of the software design of user terminal, making use of embedded system design technology. First, a stable hardware system is needed by smart home system to act as the centralized controller. So an embedded circuit with the processor of S3C2440A and other peripheral circuit, such as DM9000, is designed. Secondly, the good scalability and open source of Linux will be made full use to build the development of software environment. In this way, it lies the foundation for the realization of the operation and control function of smart home. In the development of process control software, QT which is based on underlying Linux will also be an important carrier of the smart home system interface. Meanwhile, the key to interoperability between smart home system equipment is the connection and control between the control circuit of smart home and its relateddevices. Therefore, the method of web control system based on wifi will be applied to it, and the connection among the devices in home will base on wifi, using the page that is based on web to control the related equipment. Beside this because the pages can be invoked through the appropriate browser, it also brings cross-platform features operational aspects. So, it goes without saying, such constructed smart home system with the advantages of low cost, easy operation and cross-platform control, etc, will be able to improve the interoperability throughout the ideal smart home control circuit devices. Finally, it also offers another easy way to help the members who can’t use smart devices in our home to control the system through IR circuit, it acts as an add to smart home system. A smart home system based on wifi communication and web control is designed through using the design of software and hardware. And some function modules are debugged. The desired design goals of the characteristics of low cost, easy to use and cross-platform are achieved.