The sea has extremely abundant wind resources, and studying offshore wind power hydrogen production technology and load side demand response is of great significance for wind power consumption and smoothing the volatility of offshore wind power. Therefore, a source-load multi-time scale optimization scheduling strategy for a hydrogen containing integrated energy system （IES） including hydrogen production from multiple demand responses and offshore wind power is proposed. Firstly, the operating mechanism of the offshore wind power hydrogen production （OWHP） system is explored, and an OWHP model is constructed, which includes wind power hydrogen production, seawater desalination, hydrogen compression, hydrogen transmission pipelines and gas hydrogen storage. A hydrogen energy multi energy utilization model is also constructed, which includes gas hydrogen blending, hydrogen methanation and hydrogen fuel cells. Secondly, the regulation characteristics of load side response resources at different time scales are analyzed, and a multi demand response model is proposed. Finally, in order to reduce the impact of prediction errors in offshore wind power on IES operation, a multi-time scale of three stages optimization model consisting of day ahead, day ahead, and real-time is proposed to smooth out system power fluctuations. The simulation results of the case study show that the proposed model can effectively absorb offshore wind power resources, improve IES economy and low-carbon performance, and alleviate the impact of source and load uncertainties on system operation.