A manufacturing method of a housing includes the following steps: an object providing step, a shaping step, a cooling step, a tempering step and a stamping step. In the object providing step, a semi-finished object is provided. In the shaping step, the semi-finished object is heat shaped to form a plate. In the cooling step, the plate after heat shaping is cooled. In the tempering step, the plate after cooling is tempered at a low-temperature. In the stamping step, the plate after tempering at the low-temperature is stamped at a normal temperature to form a housing.