Cable communication often brings some problems such as difficulty in wiring, equipment flexibility is not high in the process of industrial production, And the range of the existing wireless intelligent temperature transmitter transmits data is very close，at the same time past temperature transmitter’s range adjustment used to be changed resistance, steps are tedious，it brings much inconvenience to debug In order to solve these problems, this paper combines temperature transmitter with 3G technology and programmable gain amplifier. Modifying software parameters can easily adjust range. This paper introduces a kind of intelligent temperature transmitter which uses " programmable gain amplifier +A/D + microprocessor+ D/A" model, realizing the design of wireless intelligent temperature transmitter. The temperature transmitter has many functions, such as its range can be adjusted, 3G wireless communication, LCD 1602 realtime display and so on. The whole circuit design is simple, high precision and good stability, having a certain practical value and application prospect.