The invention provides a waste heat recovery product well system for ISC and an operation method of the waste heat recovery product well system for the ISC. The waste heat recovery product well system for the ISC comprises a product pipe, a jacketed pipe, a water cooling pipe, a monitoring instrument system, a product well bushing, a high-temperature high-pressure wellhead device, a ground waste heat recovery device and the like. Each component in the product well system is easy to recycle and reutilize. Heat carried out by high-temperature high-pressure downhole steam can be used for the ground production technology, turbine power generation, boiler power generation, other ground public facilities or plant life purposes and the like. By the adoption of the waste heat recovery product well system for the ISC and the operation method of the waste heat recovery product well system for the ISC, effective monitoring, control and protection of a product well can be achieved, waste heat of high-temperature crude synthesis gas is reliably and effectively recycled and comprehensively utilized, the consumption of cooling water is significantly reduced, and the requirement for downstream waste water treatment is lowered, comprehensive and efficient utilization of coal is achieved, the energy consumption of the whole ISC is lowered, and the technical problems faced by the existing ISC are finally solved.