A streetlight device includes a power source portion and a lighting portion. The power source portion includes a driving power source, a power source base provided with a receiving space for receiving the driving power source, and a power source upper cover for closing the power source base. The lighting portion is connected at one end of the power source upper cover. The power source upper cover and the power source base are connected with each other through a hinge assembly. The power source upper cover is provided with a power source mounting assembly, and the driving power source is mounted onto the power source upper cover through the power source mounting assembly.