The utility model discloses a ring main unit internal environment signal wireless collecting device which comprises a temperature sensor, a humidity sensor, an ozone sensor, a first A/D convertor, a second A/D convertor, a filter, a power amplifier, a digital signal processor, a single chip microcomputer and a GPRS module. The temperature sensor and the humidity sensor are respectively connected with the digital signal processor through the first A/D convertor; the ozone sensor, the filter, the power amplifier, the second A/D convertor and the digital signal processor are sequentially connected; the digital signal processor, the single chip microcomputer and the GPRS module are sequentially connected. The ring main unit internal environment signal wireless collecting device is simple in structure and capable of simultaneously collecting a temperature signal, a humidity signal and an ozone concentration signal in the ring main unit.