The invention discloses a dual-purpose energy-saving air conditioning device with ice storage and heating functions. The dual-purpose energy-saving air conditioning device adopts combination of a water-cooled chiller unit and an energy-saving plate-ice machine; the energy-saving plate-ice machine adopts a blow-up evaporator and a hot-gas bypass pressurizing backflow and continuous ice-melting device so as to form three circulating systems for ice making and storage, refrigeration and heating respectively, can store ice and supply cold for peak-load shifting of a power grid in summer and can extract water-ice phase-change latent heat for high-efficiency clean heating in winter, so that the cold-supply and heating comprehensive efficiency can be greatly improved, the electric charge and theinvestment are reduced, and especially the water-cooled chiller unit can be transformed into a high-efficiency energy-saving environment-friendly device with integration of ice storage, refrigerationand heating in low cost.