Abstract: In order to investigate the temperature change and distribution of coal adsorption, the study designs the temperature measurement system of gas adsorption and desorption. The system mainly consists of several subsystems including a temperature control system, an adsorption and desorption experiment system, and a multi-point temperature measurement system. The experiment studies the gas adsorption quantity and the temperature change of different coal samples under constant temperature at 20 ℃ and different adsorption equilibrium pressure. The distribution of temperature field inside the jar is derived in the experiment. The best point to measure the temperature of the adsorption process is found. Through the fitting analysis, the relationship between a certain point of temperature change maximum and the central point is obtained.