A production line system (1) comprises a core apparatus (10) of a stacker crane form and various processing lines (20, ..., 110) for performing various processes on a glass substrate that is received in a substrate receiving cassette stored in the core apparatus (10) and connected at plural loading/unloading positions (C1, C2) of the core apparatus (10) through a substrate loading/unloading mechanism (16a, 16b). At this time, the processing lines (20, ..., 90) are production lines that are used to perform various process for producing color filters, wherein the processing lines (20, ..., 70) are main screen-making lines for performing the processing steps including photolithography process, while the processing line (90) is a reserve screen-making line for performing the same process. Further, processing line (100) is a substrate inspection line that inspects a processed glass substrate that has been processed in the processing lines (20, ..., 90), and the processing line (110) is a substrate regeneration line that regenerates a glass substrate in which a defect was detected. Further, in a conveying path (15) of the processing lines (30, ..., 70), common defect inspection machines (39-77) are arranged for inspecting a common defect occurring at the same position in a plurality of glass substrates of the processed object. Further, the cassette that is stored and conveyed by the core apparatus (10) is preferably a frame line type cassettes that uses a plurality of frame lines suspending between left and right frames to support the substrate in a horizontal status.