The realization of high sensitivity terahertz detector which can be operated at room temperature poses difficulty in this field. The terahertz detector based on the principle of thermoelectricity provides the posibility for wide detection frequency range and high sensitivity detection at room temperature. By utilizing the high carrier mobility and excellent thermoelectric properties of new micro-nano materials such as graphene and perovskite, the high-performance terahertz photodetectors operating at room temperature were prepared, the detection of the photoelectric response can be up to 271 mA/W, and the response time is less than 20 ms. Results show that photothermoelectric detectors prepared by graphene and perovskite are expected to be a new generation of high performance detectors in terahertz frequency band.