At　present,　all　types　of　large-medium-sized　supermarkets　with　aquatic　products　adopt　ice　preservation　to　ensure　freshness.　The　traditional　method　of　ice　preservation　needs　to　make　a　large　amount　of　thick　ice　and　thus　wastes　manpower　and　freshwater.　A　new　ice　preservation　system　with　cold　storage　(IP&CS)　is　designed,　and　its　performance　is　tested.　The　use　of　a　cold　storage　tank　to　replace　the　thick　ice　laid　achieves　a　repeated　cold　storage　and　discharge.　This　experiment　uses　NaCl　solution　as　the　cold　storage　phase　change　material　(PCM).　The　phase　change　temperature　of　the　cold　storage　PCM　and　the　optimum　temperature　of　the　secondary　refrigerant　during　the　cold　storage　process　are　determined.　Results　show　that　the　center　temperature　of　aquatic　products,　water　loss　rate,　color　of　aquatic　products,　power　consumption,　and　electricity　cost　of　the　IP&CS　system　are　better　than　those　of　the　traditional　ice　preservation　system.