The invention discloses a wind turbine generator gear case remote monitoring device. The wind turbine generator gear case remote monitoring device comprises wireless multiclass sensor terminals, an embedded router and a GPRS data transceiver terminal, wherein the wireless multiclass sensor terminal comprise integrated sound emission, vibration and temperature multiclass sensor modules, amplification modules, data acquisition and processing modules and wireless data transceiver modules. During monitoring, the multiple wireless multiclass sensor terminals are distributed on monitoring points of a wind turbine generator gear case, the wireless multiclass sensor terminals detect temperature, vibration and sound emission data of the monitoring points in real time, and the data is sent to the GPRS data transceiver terminal through the embedded router and is remotely transmitted to a data analysis processing computer of a main station. The wind turbine generator gear case remote monitoring device employs digitalization, modularization and radio transmission technologies, solves problems of over-long connection wire, complex mounting and difficult maintenance of a traditional wired monitoring device, and further solves a problem of single-class measurement existing in the traditional monitoring device employing a vibration sensor.