Telephone office has many unmanned program - controlled switch rooms, environmental conditions and equipment work states of these rooms need central control room for remote monitoring and management. The room environmental monitoring system of this paper make microcontroller as the core, and adds related circuits to collect spot environmental parameters (voltage, power, temperature, humidity, etc.) and monitor equipmental states, mainly discusses the sensor data acquisition and processing ,multi-sensor data transmission, management and display of the remote-control room technology, on the basis it completes the sensor data colletion unit, communicational unit and the other hardware equipments.
In this paper, firstly, introduces the background and domestic situation of the program - controlled switch rooms, and discusses the features of the room environmental monitoring system , the overall structure 、 function、features and advancements of the paper. Then it introduces the design principle of sensor transmission unit ((SENS) and room data acquisition unit (DAC), and design ideas of the room environmental monitoring system`s communication module (COM), communication groupping programs of communication network. Finally, it introduces the overall design program and the principle and means of several major components , in respect of the problems of the control room environment monitoring information systems , point out further improved problems and contents.
KEYWORDS：monitoring and controlling, surroundings parameter, DTMF encode and decode, serial communication。
