System for detecting gas concentration throughout the space

The invention relates to a system for detecting gas concentration throughout the space. The system comprises a positioning basis point, a detection terminal, and a gas sensor, a communication equipment of a monitoring centre and a computer arranged on the detection terminal, wherein the detection terminal receives radio-frequency signals emitted by the positioning basis point, calculating current position coordinates of the detection terminal according to an attenuation degree of the signals and the coordinates of the positioning basis point, detecting a gas concentration according to the gas sensor of the detection terminal, converting the concentration signals into electrical signals, sending information of the position coordinates and gas concentration to the communication equipment of the monitoring centre in a wireless way by the detection terminal, and then sending the information to the computer by the communication equipment of the monitoring centre. The system for detecting the gas concentration throughout the space uses a detection apparatus of such design, can conveniently detect and record gas concentration throughout the space, and accurately determine corresponding positions, thereby conveniently transmitting and summarizing detection results.