The utility model discloses a passive power supply system of logging wireless sensor, signal acquisition element, battery including the monitoring of engineering parameter carry out the solar charging unit that charges, battery management the control unit and the data teletransmission unit that the battery is optimized, the utility model discloses the wireless transmission design of the logging sensor that at first goes on monitoring to the engineering parameter at scene has reduced the complexity of on -the -spot wiring, easily interface extension simultaneously, next radio communication design of adopting the zigBee low -power consumption, optimize the power supervisor mode and ultra -low power consumption's circuit design can satisfy high reliability, long -time work simultaneously, carry out anti -interference design to wireless data transmission at last, improve signal transmission's under the on -the -spot working condition accuracy.