To provide an in-line working process of a liquid crystal display and a device thereof which can reduce the production line without influencing the yield and which can decrease the number of appliances, buffer stockers and the manpower.

A liquid crystal display unit is taken out from a buffer stocker by a loader, placed on a manufacturing processing machine to be cut, beveled and chamfered by cutting and beveling units, and then directly transferred to a brush cleaning unit to be cleaned. After cleaning, the semifinished product is directly transferred from a linked buffer stocker to an affixing unit, where a polarizing plate is laminated and then the semifinished product is placed on the buffer stocker by an unloader. At the same time, while the semifinished product is transferred through the articulated buffer stocker, the product is subjected to sampling, inspection and discrimination by an inspection unit which is directly connected to the linked buffer stocker.