According to one embodiment, a processing system includes a first vessel, a destination part to be transported, and a liquid sending part. The first vessel gathers a product being liquid temporarily. The destination part to be transported includes a second vessel to gather the product transported from the first vessel. The liquid sending part includes a first portion. The first portion includes a nozzle and a first mechanism. The nozzle discharges the product provided between the first vessel and the destination part to be transported. The first mechanism is purged by an inactive gas.