Considering climate change adaptation in provincial land and space planning is of great significance for ensuring good ecology, agricultural safety, and urban livability. In conjunction with the compilation of the “Liaoning Provincial Land and Space Planning (2020–2035)”, a land and space planning meteorological assessment technology suitable for climate has been established. From the three dimensions of climate resources, meteorological disaster risk, and wind-heat environment and meteorological diffusion capacity, 25 elements are selected to study the climate endowment and risk of land and space, and the spatial evaluation of agricultural and urban climate suitability and ecological climate importance is given; and using the climate change forecast results under different scenarios from 2020 to 2035, the spatiotemporal distribution of the province’s future climate is analyzed. In summary, a comprehensive climate zoning of Liaoning Provincial Land and Space Planning is drawn, and climate adaptation strategy suggestions for each zone are proposed.