Measurement system and measurement method

A measurement system, comprising:

• a shape measurement unit which optically measures a three-dimensional shape of a work piece disposed at a predetermined position;
• a storage unit which previously stores a three-dimensional shape indicating an entire model for each work piece type;
• and
• a recognition processing unit which executes at least one of a detection of presence of a work piece and a specification of a work piece type based on whether or not the three-dimensional shape measured by the shape measurement unit is consistent with any one entire model stored in the storage unit,
• wherein the entire model for each work piece type is specified by a combination of a plurality of partial models and each of the plurality of partial models is correspondently given a degree of importance, and
• the recognition processing unit determines whether or not the three-dimensional shape is consistent with any one entire model based on the degrees of importance corresponding to one or more partial models included in the entire model.