Substrate processing system and substrate processing method

A substrate processing system, comprising:

• a loading/unloading portion configured to load a cassette that contains a plurality of unprocessed substrates corresponding to one lot and to unload a cassette that contains a plurality of processed substrates corresponding to said one lot;
• a processing portion having a plurality of processing units configured to perform a plurality of processes for substrates;
• a conveying portion, disposed in said processing portion, configured to exchange substrates with said loading/unloading portion and successively convey the substrates to the plurality of processing units;
• a process procedure setting portion configured to set process procedures including process conditions for individual lots;
• a calculation processing portion configured to calculate a process completion prediction time for predicting a process timing for said one lot;
• and
• an informing portion configured to inform an operator of the process completion prediction time calculated by said calculation processing portion,
• wherein the process completion prediction time is a first process completion prediction time at which a first processed substrate of said one lot is returned to said loading/unloading portion after a first unprocessed substrate is conveyed to the processing portion.