Coal is coupled with renewable energy and green hydrogen to build a coal-based zero-carbon/low-carbon integrated energy center, which can significantly improve the stability and flexibility of regulation of new power systems, significantly reduce the carbon emissions of power generation, and  low-carbon alternative fuels are produced for deep decarbonization of downstream industrial sectors, or for cross-season storage. Based on this, typical systems such as IGCC（Integrated Gasification Combined Cycle） co-production of methanol coupled with photovoltaic hydrogen production, IGCC co-production of ammonia coupled with photovoltaic hydrogen production, oxygen-rich combustion coupled with photovoltaic hydrogen production, and CO2 hydrogenation to methanol were constructed. The basic mass-energy balance matching of each unit, and the different daytime/nighttime operation modes adapted to the fluctuations of renewable energy with typical capacity were analyzed. The technical status of each unit were also analyzed and It was believed that these systems had the basic technical feasibility. The coupling system composed of IGCC with coal dosage of 2 000 t/d, 420 MW photovoltaic, 84 000 m3/h hydrolytic hydrogen production and 2 500 t/d methanol synthesis can realize the on-grid load regulation from 0 to 557 MW and methanol production regulation from 750 to 2 500 t/d. The coupling system composed of IGCC with coal dosage of 2 000 t/d, 435 MW photovoltaic, 87 000 m3/h water electrolysis for hydrogen production, and 2 000 t/d synthetic ammonia can realize the on-grid load regulation in 0-605 MW, and the production of synthetic ammonia regulation in 600-2 000 t/d. The coupling system consisting of 200 MWe coal oxygen-rich combustion power generation system, 80 000 m3/h CO2 capture,3 600 MW photovoltaic, 720 000 m3/h water electrolysis for hydrogen production, and 2 743 t/d methanol synthesis (CO2 hydrogenation for methanol production) can achieve on-grid power regulation between 60 and 3 660 MW. The methanol yield is regulated from 823 to 2 743 t/d. In these systems, the process of coal conversion and utilization provides the basis for stable and reliable operation and flexible regulation of the system, which can greatly absorb the fluctuations of renewable energy. Coal and renewable energy are coupled to achieve the dual goals of low carbon and stability that are difficult to be achieved simultaneously when they operate separately. At the same time, the effective utilization of greenhydrogen by-product O2 can effectively reduce the cost of traditional IGCC and oxygen-rich combustion. A coal-based zero-carbon/low-carbon integrated energy center combining coal, renewable energy and green hydrogen has a good development prospect in the future, and will play an important role in the realization of China′s carbon peak and carbon neutrality strategic goals. In order to promote the large-scale application of coal-based zero-carbon integrated energy center in the future, PEM water electrolysis hydrogen production technology adapted to the fluctuations of renewable energy, H2 large-scale low-cost storage technology, CO2 hydrogenation to methanol technology, gas turbine to fuel H2 technology, etc. need to be further scaled up and greatly reduced in cost, so as to promote the large-scale application of coal based zero carbon comprehensive energy center in the future.