A system completely automates process steps to reduce contamination, enables quantification of products, and reduces the defective ratio. Sample containers are transported on a unit by unit basis, each unit consisting of a predetermined number of containers, and supplied to the individual dispensing/aspiration apparatuses and each reaction bath. In order to ensure quantification and reliability of the reaction/processing of the sample, a reaction monitoring sensor is provided, and the sample containers are affixed with barcodes to identify the samples. Samples determined through monitoring to be defective are returned to a predetermined step site where reaction/processing is performed again.