Please refer to FIG. 6 in conjunction with FIG. 8. FIG. 6 shows a schematic diagram of a sensing lamp in normal status according to an embodiment of the present disclosure, and FIG. 8 shows a top view drawing of a sensing lamp according to an embodiment of the present disclosure. In FIG. 8, the cover 222 is removed, for ease of explanation and indication of the sensing unit 221. The control circuit 2212 is disposed in the sensing unit 221. The cover 222 partially covers the sensing unit 221. The cover 222 is combined with the light body 21 for partially covering the sensing unit 221. In this embodiment, an infrared sensing unit or a light sensing unit is taken as the example of the sensing unit 221, but the present disclosure is not so restricted. The sensor 2211 comprises at least one sensing element and a lens. For example, the sensor 2211 comprises at least one sensing element 2211A and a lens 2211B. The sensing element 2211A is electrically coupled to the control circuit 2212. The lens 2211B is disposed in front of the sensing element 2211A. The lens 2211B and the sensing element 2211A can be an integral structure. The material and the shape of the lens 2211B is not limited, and can be determined based on the type of the sensor. When the sensing unit 221 is an infrared sensing unit, the sensing element 2211A is an infrared sensing element, and the lens 2211B is an infrared lens. When the sensing unit 221 is a light sensing unit, the sensing element 2211A is a light sensing element, and the lens 2211B is a normal optical lens. In another embodiment, when the sensing unit 221 is a microwave sensing unit, the sensor 2211 is replaced by a microwave sensor comprising at least one microwave antenna, and the antenna is electrically coupled to the control circuit 2212, wherein the microwave sensor receives the microwave reflected by people (or object).