The temperature transmitter is being integrated inside the junction box of explosion-prevention thermocouple and thermal resistor, which is directly applied on the site. Inputting directly signals from 4 to 20mA on the operating site, the integrated temperature transmitter improves the disturbance- resistant capability in the long-distance transmission of signal, directly measures the temperature liquid, vapor and gas mediums within the scope from -200 to 800 and converts the temperature into 4 to 20mA to the display, record instruments or computer, which is in direct proportion with the temperature of the thermocouple and resistor or output electrical signal.