The invention provides an intelligent communication system based on power lines. The intelligent communication system based on the power lines comprises power line sending and receiving modules, comprehensive control terminals and multifunctional branch terminals, wherein the power line sending and receiving modules are designed to resist high voltage, universal mains supply sockets in China are adopted by the power line sending and receiving modules, the power line sending and receiving modules are applicable to various environments with the power lines, are provided with storage batteries, and can store electricity on the storage batteries when the power line sending and receiving modules are energized through the mains supply so that electricity can be used when an outage happens. The power line sending and receiving modules, the comprehensive control terminals and the multifunctional branch terminals are in modular design, and different functions can be achieved through different modes of combination. A control portion is formed by the comprehensive control terminals and the power line sending and receiving modules, and a branch control portion is formed by the multifunctional branch terminals and the power line sending and receiving modules. According to the structure, the function of simple control over electric appliances such as electric lamps on campuses, in hospitals and the like, the function of calling and the function of giving out an alarm can be achieved. An intelligent communication device circuit based on the power lines is designed according to the practical requirements and development of power line communication, the intelligent communication device circuit based on the power lines is quite good in practicability and expansibility, is an independent communication system, and is low in energy consumption, an external 12V storage battery can be adopted, and communication can be kept under the situation of outages of the power lines.