Measurement system and measurement method

A measurement system comprising:

• a housing;
• a holding unit disposed within the housing, the holding unit being separate from the housing and having a box shape, and two openings, which are a measurement opening and an identification opening, being formed at an upper surface of the holding unit;
• an insertion gate into which a test strip including a first region and a second region is to be inserted into the holding unit;
• and
• a holder formed in the holding unit that accommodates the test strip inserted via the insertion gate, wherein:
• the housing includes a window facing the test strip accommodated in the holder,
• a smart device including an illuminator that illuminates the second region of the test strip accommodated in the holder and including a camera that images the first region and the second region,
• the housing includes a mounting part that places the smart device on an outer surface of the housing in a state in which the camera and the illuminator are disposed at positions facing the window, and a measurement light source provided at a position to irradiate the first region of the test strip accommodated in the holder, and
• in a case in which the camera images the first region, the illuminator is turned off while the measurement light source is turned on, and in a case in which the camera images the second region, the illuminator is turned on.