A system for energy recycling using mechanical vapor recompression in a combined chemical process, such as a process comprising the production of ethylene oxide as an intermediate product and the production of the final product ethylene glycol, characterized in that the system comprises: a heat exchange reactor for generating an intermediate material by means of an exothermic reaction and discharging the generated intermediate material, and heat-exchanging heat generated in the exothermic reaction with water supplied from outside so as to generate water vapor; an absorption tank for receiving the intermediate material, and mixing the intermediate material with water, so as to generate an intermediate material aqueous solution; a stripper for receiving the intermediate material aqueous solution, and separating the intermediate material into an intermediate material gas and an intermediate material aqueous solution; an endothermic reactor for receiving the intermediate material water-rich aqueous solution, and reacting the intermediate material with water, so as to produce a final product aqueous solution; an evaporation concentrator for receiving the final product aqueous solution, and heat-exchanging heat of the water vapor from the heat exchange reactor with the final product aqueous solution so as to generate steam; a dehydrating distillation tower for receiving, dehydrating, and purifying the final product aqueous solution discharged from the evaporation concentrator; and a mechanical vapor recompressor for compressing the steam from the evaporation concentrator , and providing the compressed steam as a source of heat or a source of steam supply wherein the mechanical vapor recompressor is in fluid communication with the endothermic reactor , such that the endothermic reactor receives heat from the steam discharged from the mechanical vapor recompressor. a heat exchange reactor for generating an intermediate material by means of an exothermic reaction and discharging the generated intermediate material, and heat-exchanging heat generated in the exothermic reaction with water supplied from outside so as to generate water vapor; an absorption tank for receiving the intermediate material, and mixing the intermediate material with water, so as to generate an intermediate material aqueous solution; a stripper for receiving the intermediate material aqueous solution, and separating the intermediate material into an intermediate material gas and an intermediate material aqueous solution; an endothermic reactor for receiving the intermediate material water-rich aqueous solution, and reacting the intermediate material with water, so as to produce a final product aqueous solution; an evaporation concentrator for receiving the final product aqueous solution, and heat-exchanging heat of the water vapor from the heat exchange reactor with the final product aqueous solution so as to generate steam; a dehydrating distillation tower for receiving, dehydrating, and purifying the final product aqueous solution discharged from the evaporation concentrator; and a mechanical vapor recompressor for compressing the steam from the evaporation concentrator , and providing the compressed steam as a source of heat or a source of steam supply wherein the mechanical vapor recompressor is in fluid communication with the endothermic reactor , such that the endothermic reactor receives heat from the steam discharged from the mechanical vapor recompressor. <EOS>