The invention discloses a detector device, comprising an adjusting positioning base which comprises a horizontal plate which can be fixedly connected with an annular rotary table or round plate; a vertical plate extending from the horizontal plate and vertical to the horizontal plate, while the vertical plate is provided with a horizontal full-length groove at one side; and a detector module which can be fixedly mounted in the horizontal full-length groove of the adjusting positioning base. In the technical scheme, the detector device has compact structure, whose adjustment and positioning can be accurately realized. The invention further provides a CT inspection provided with the detector device.