Provided is a machine tool system that can supply an appropriate amount of lubricating oil to a machine tool according to the operation thereof. The machine tool system comprises: a lubricating oil supply unit that supplies a lubricating oil to a feed shaft of a machine tool; a code analysis unit that analyzes a machining program and determines whether a specific reciprocating operation is to be carried out at the feed shaft; and a control unit which, if it has been determined that the specific reciprocating operation is to be carried out, changes the supply of the lubricating oil via the lubricating oil supply unit to an exclusive pattern when the machine tool carries out the specific reciprocating operation.