The nature of the climate problem is an issue of human development. Human development is about the development of people, namely, how to enhance people's ability and expand people's choice and freedom. Responding to the climate change, we must adhere to the sustainable development based on equality. The organic unity of climate intergenerational justice and climate intragenerational justice is of vital importance. Equality is all-round justice including both the vertical justice and horizontal justice, while the latter should be the emphasis. Key words：human development; global interests; climate justice; ethical demands