本系统由单片机系统、ATK-SIM900A系统、矩阵键盘、LCD液晶屏显示和报警系统组成。系统能完成自动关联SIM卡、自动开关锁、超时报警、超次锁定、管理员解密、修改用户密码、及基本密码锁的功能。除上述基本的密码锁功能外，还具有调电存储、声光提示、客人电话联系主人、主人给客人提供一次有效的随机码、报警实时通知主人等功能。本系统成本低廉，功能实用，且应用广泛。例如，可以作为汽车车门锁，也可以作为仓库和家用门锁等。-The system consists of single-chip system, ATK-SIM900A systems, matrix keyboard, LCD screen LCD display and alarm system. The system can be completed automatically associated SIM card, automatic switch lock, police overtime, junior locked administrator to decrypt, modify user passwords, and basic lock function. In addition to these basic password lock function, but also has a tune electric storage, sound and light tips, contact the owner guests telephone, the owner give guests a valid random code, the alarm immediately notify the owner and other functions. The system is low-cost, functional and practical, and is widely used. For example, as a car door lock, can be used as warehouse and home door locks.