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"Carbon neutrality" refers to the total amount of carbon dioxide or greenhouse gas emissions directly or indirectly produced by a country, business, product, activity or individual over a period of time. Through afforestation, energy saving and emission reduction, etc., to offset the carbon dioxide or greenhouse gas emissions generated by itself, to achieve positive and negative offset, to achieve relative "zero emissions", which belongs to the same term as "carbon peaking" in energy saving and emission reduction. "Carbon" means carbon dioxide, and "neutralization" means a positive and negative balance. The carbon dioxide or greenhouse gas emitted is offset by afforestation, energy saving and emission reduction, which is called "carbon neutrality". Goal decomposition is the process of gradually completing the overall goal according to multiple fields to form a goal system. Target decomposition should be carried out according to the principle of integration and integration. That is, the overall goal is decomposed into sub-goals of different levels and departments, and the synthesis of each sub-goal reflects the overall goal and ensures the realization of the overall goal. This paper aims to study the decomposition of building carbon neutrality goals to sustainable energy development strategies, combining energy conservation and emission reduction with the building industry to reduce environmental pollution and energy waste. Based on the theory of sustainable development, combined with the development characteristics of China's new energy industry, this paper makes a theoretical analysis of the sustainable development of the new energy industry from the three systems of economy, society and ecology. Using the new growth theory and the dissipative structure theory, the restricting effect of the depletion of basic energy on economic development and the influence on the alternation of industrial structure are discussed. The experimental results of this paper show that the building energy consumption intensity will reach 1.43tC/10,000 yuan, 1.25tC/10,000 yuan in the ideal scenario, and 1.1tC/10,000 yuan in the low-carbon scenario. [ABSTRACT FROM AUTHOR]