Disclosed is a millimeter-wave receiving device. The device includes at least one radiometer (83); and a positioning assembly (824) for holding the radiometer (83), wherein the positioning assembly (824) comprises: a first positioning member (82) having a first surface (821); a second positioning member (84) having a second surface (841), the first surface (821) of the first positioning member (82) and the second surface (841) of the second positioning member (84) holding the radiometer (83) in opposite to each other. With the configuration according to the present invention, the at least one radiometer (83) in the millimeter-wave receiving device can be located in all of freedoms on basis of various design requirements of the radiation path to ensure that the radiometer (83) can be arranged in desired receiving positions.
