Off-line sampler and contamination collection system

The invention discloses an off-line sampler and a contamination collection system. The off-line sampler comprises a test tube module, a cover taking and placing component and a driving component, the test tube module comprises at least one test tube, the test tube comprises a tube body and a cover body, the tube body is used for receiving scanning liquid dissolved with metal contamination, and the cover body is used for blocking an opening of the tube body; and the driving part is used for driving the cover taking and placing part to act so as to take the cover body and drive the cover body to move to a position where the tube body is not interfered to receive the scanning liquid, or placing the cover body on the tube body. The off-line sampler can automatically uncover the test tube, and can automatically close the cover after the tube body of the test tube collects scanning liquid dissolved with metal contamination, so that the tube body is sealed, and external pollutants are prevented from falling into the