Disclosed is a sample analysis system (100) comprising a cleaning liquid preparation apparatus (4) that prepares a cleaning liquid, and a sample analyzer (1) that comprises a measurement unit (2) that measures a sample and a reservoir that stores the cleaning liquid prepared by the cleaning liquid preparation apparatus (4). The sample analyzer (1) cleans at least a part of the measurement unit (2) with the cleaning liquid. The cleaning liquid preparation apparatus (4) selectively executes a first supply mode to supply the cleaning liquid to the reservoir when a liquid amount in the reservoir reaches a first amount, and a second supply mode to supply the cleaning liquid to the reservoir when the liquid amount in the reservoir reaches a second amount less than the first amount.
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