Abstract: Provided is a machining tool system configured to be utilized in an environment in which a hydraulic fluid and a processing fluid are mixed, in which a water-soluble material that does not contain an oil-soluble materials derived from a mineral is used for the hydraulic fluid and the processing fluid (collectively, the “fluids”). The machining tool system includes: collecting means for collecting the fluids after a lubricating effect ends while being mixed, the collecting means being disposed downstream of a lubricating flow path of the machining tool; a discharging container communicating with the collecting means and storing the fluids; and circulating means for suctioning the fluids inside the discharging container without separation into oil and water from an inlet port in the discharging container at a position separated from a bottom portion and returning the fluids to a supply flow path of the processing fluid and/or the hydraulic fluid.