The present disclosure provides a heat transferring device and a heat transferring component thereof. The heat transferring device includes a heat transferring component, a lower plate and a positioning component. The heat transferring component is in a shape of pouch and includes at least one input end and at least one output end to allow a fluid to be inputted and outputted. The lower plate includes at least one first perforation. The positioning component is disposed on an exterior of the heat transferring component. An end of the positioning component is connected to the lower plate.