1. A particle beam therapy system comprising: a charge particle beam generator for emitting a charged particle beam; at least one treatment room in which an irradiation unit for irradiating the charged particle beam is disposed; a beam transport system communicated with said charged particle beam generator and transporting the charged particle beam emitted from said charge particle beam generator to said irradiation unit in said treatment room; a first manual input device provided in said treatment room or a control room formed corresponding to said treatment room, and inputting an irradiation ready state a safety device for confirming that preparations for generation of the charge particle beam in said charged particle beam generator are completed and preparations for transport of the charged particle beam in said beam transport system for introducing the charged particle beam to said irradiation unit in the treatment room selected in response to ready signal from said first manual input device are completed, followed by outputting ready information; a ready state display unit for displaying the ready information; and a second manual input device provided in said treatment room or said control room, and inputting an irradiation start instruction when the ready information is displayed by said ready state display unit.