Gas detection system, device and method

A gas detection system, apparatus and method for causing the main gas detection system for detecting unit by means of variable pulse voltage waveform elevating the temperature to thereby output a sensing signal corresponding to the reaction gas molecules with a specific space, so that then gas detection system processing unit sensing operation signals, so that the analysis unit determines whether a particular space stored with the target gas, and further analysis of the composition and concentration of the target gas in a particular space. In this way, then accurate, fast and convenient to complete testing.