The invention discloses a sensor device for an underground electrohydraulic control dual-way power device. A temperature sensor, a pressure sensor, a displacement sensor and a circuit board are integrally arranged, meanwhile a mandrel structure is provided with a five-core cable passage, a high and low pressure oil path, and a well fluid passage, the sensor device is connected with an undergroundelectrohydraulic control dual-way motion device through a standard mandrel connection nut, the environment temperature, pressure and motion displacement amount parameters of the underground where theunderground electrohydraulic control dual-way motion device is located are collected and uploaded to a ground monitoring device, and technical guarantee is provided for reliable work of the underground electrohydraulic control dual-way motion device. Meanwhile, through the sensor device, other devices connected with the lower portion of the sensor device communicate with a five-core cable, a highand low pressure oil path and the well fluid passage of the underground electrohydraulic control dual-way power device, and work of control over a lower connection device, collection of underground liquid samples and the like can be achieved.