The purpose of watering tree is to irrigate the substrate layer on each bed for mycelium and mushroom growth. Watering tree system consists of one watering tree and one trolley installed with a tank and a pump. Both hanging-type and walking-type watering trees are equipped with imported brass noozles, pressure gauge and flow meter. The trolley moves the tank into growing room and pump to supply water to the watering tree. The number of watering levels can be customized according to bed number.