Abstract: The risk-based solution to the problem of collaborative quality control for supply chain of perishable goods was investigated considering three cases, i.e., the purchaser hid the information on quality evaluation, the supplier hid the information on quality prevention and both information was hidden. The principal-agent models of collaborative quality control for supply chain of perishable goods were developed according to the quality risk share level between the supplier and purchaser. Then, the penalty level for quality defect and the share to be taken by both parties for exterior loss were given via decision optimization so as to achieve the optimal objective, i.e., the whole supply chain gain is biggest with the maximum profits available to either supplier or purchaser. A numerical example is given to illustrate the collaborative quality control model under different conditions.