Green hydrogen and green oxygen coupling coal chemical process and system

The invention discloses a green hydrogen and green oxygen coupling coal chemical industry process, and belongs to the technical field of coal chemical industry. The process comprises the following process steps: transmitting green power generated by renewable energy through a power generation unit to a water electrolysis hydrogen production unit through an independent micro-grid unit, and hydrolyzing to generate hydrogen and oxygen; conveying the generated hydrogen and oxygen to a gas storage/transmission unit for storage and later use, and then conveying the oxygen to a coal gasification unit to produce crude synthetic gas; conveying the crude synthetic gas to a synthetic gas purification unit, and purifying to obtain synthetic gas; and directly using the synthetic gas as the direct product, or mixing the synthetic gas and hydrogen in a gas storage/transmission unit to be used as the product, or carrying out CO/H2 proportion adjustment for coupling application. According to the process, the independent micro