This study focuses on the characteristics of two climatic zones of hot summer and cold winter and hot summer and warm winter for Fujian Province, establishes three typical building models of office, commercial, and medical buildings, performs annual hourly load simulation and energy efficiency analysis, and establishes a zoning and hierarchical energy efficiency indicator system. The k-means clustering algorithm is used to analyse and compare the data, and the energy efficiency limit values for one-star to three-star high-efficiency refrigeration rooms in Fujian Province are determined. The one-star energy efficiency indicator is the same as that in the national standard, and the two-star and three-star energy efficiency indicators are slightly higher than those in the national standard.