A tableware washing device, comprising: an inner liner, configured to define a washing cavity for accommodating a tableware to be washed; a water collection cup, provided at a bottom of the inner liner, and configured to define a water collection cavity, wherein the water collection cavity is configured to collect washing water that flows from the washing cavity, the water collection cavity is communicated to the washing cavity via a first water supply pipeline, at least one of the water collection cup and the first water supply pipeline is provided with a washing pump, the washing pump is configured to pump the washing water in the water collection cavity to the washing cavity through the first water supply pipeline; and a heating apparatus, configured to selectively heat the washing water; characterised in that the heating apparatus comprises a semiconductor cooler, the semiconductor cooler is configured to perform a primary heating on the washing water, wherein the semiconductor cooler comprises a refrigeration end and a heating end, the heating end is configured to heat the washing water, the tableware washing device further comprises a heat-exchange pipeline, an auxiliary heat exchanger and a heat-exchange pump, the heat-exchange pipeline is configured to be connected to the refrigeration end, each of the auxiliary heat exchanger and the heat-exchange pump is provided on the heat-exchange pipeline, the heat-exchange pipeline is configured to form a circulation loop, heat-exchange liquid is configured to be pumped by the heat-exchange pump to circulate in the circulation loop, and to perform heat exchange with the refrigeration end. an inner liner, configured to define a washing cavity for accommodating a tableware to be washed; a water collection cup, provided at a bottom of the inner liner, and configured to define a water collection cavity, wherein the water collection cavity is configured to collect washing water that flows from the washing cavity, the water collection cavity is communicated to the washing cavity via a first water supply pipeline, at least one of the water collection cup and the first water supply pipeline is provided with a washing pump, the washing pump is configured to pump the washing water in the water collection cavity to the washing cavity through the first water supply pipeline; and a heating apparatus, configured to selectively heat the washing water; characterised in that the heating apparatus comprises a semiconductor cooler, the semiconductor cooler is configured to perform a primary heating on the washing water, wherein the semiconductor cooler comprises a refrigeration end and a heating end, the heating end is configured to heat the washing water, the tableware washing device further comprises a heat-exchange pipeline, an auxiliary heat exchanger and a heat-exchange pump, the heat-exchange pipeline is configured to be connected to the refrigeration end, each of the auxiliary heat exchanger and the heat-exchange pump is provided on the heat-exchange pipeline, the heat-exchange pipeline is configured to form a circulation loop, heat-exchange liquid is configured to be pumped by the heat-exchange pump to circulate in the circulation loop, and to perform heat exchange with the refrigeration end.