The invention relates to a millimeter wave sensor and an intelligent detector. The millimeter wave sensor comprises a signal generator, a transmitting and receiving integrated chip, a bandpass filter,an amplifier, an A/D converter and a digital signal processor which are sequentially connected. Compared with the existing 24/77GHz millimeter wave sensor, the millimeter wave sensor provided by theinvention is higher in signal frequency and has the advantages of high beam directivity, high anti-interference ability, small size and light weight. In addition, compared with a sensor formed by discrete devices, the millimeter wave sensor adopting the transmitting and receiving integrated chip based on a SiGe process has the advantages of simple structure, small size, portability, convenient mass production and low cost, greatly improves the adaptability of the sensor and provides powerful technical support for the increasingly complex information-based detection environment in the future.