A light-emitting module and a tandem light-emitting device include an insulating housing, a control chip, a light-emitting unit, and a plurality of pins. The insulating housing has an upper accommodating space and a lower accommodating space, the lower accommodating space is below the upper accommodating space directly, and the upper accommodating space forms an opening at the upper end of the insulating housing. The control chip is located in the lower accommodating space. The light-emitting unit is located in the upper accommodating space and is electrically connected to the control chip. A plurality of pins are exposed outside the insulating housing. The control chip can receive an electrical signal transmitted by an external control device through the pins to control the illumination of the light-emitting unit.