As the demand of home security is increasingly， we propose a program which based on wireless door access control system and describe the composition and overall scheme of the system. Outdoor machine which equips infrared camera communication with indoor center via wireless network. The indoor center applies ARM11 processor， and Android operating system to manage various application processes. Software and hardware design methods of indoor center are introduced in details，and outdoor machine and indoor center are manufactured for testing. Results show that the system is stable， has achieved the desired objects，can meet the needs of uses， and result demonstrates the feasibility of the design.