The work aims to achieve energy saving and cost reducing by reducing exterior wall temperature and explore application of cool pigments to building energy-saving coatings. Two types of building energy saving coatings were prepared with titanium chrome yellow and iron oxide yellow as pigments and silica sol-styrene acrylic emulsion as film former. Influence of two pigments and their content on properties of building energy-saving coatings was investigated. Properties of pigments and coatings were characterized by using XRD diffractometer and ultraviolet/visible/near-infrared spectrophotometer, infrared emissivity measurement device and precise colorimeter. Infrared lamp simulating sunlight heat source were applied to analyze heat-insulating property of the coating. Grain size and near-infrared average reflectivity of cool titanium-chrome yellow were higher than that of iron oxide yellow. Grain size and near-infrared average reflectivity were 53.2 nm and 14.06% higher than that of iron oxide yellow respectively. When content of the titanium-chrome yellow was 20%, the coatings were provided with the largest near-infrared average reflectivity, which was 68.69%. What’s more, equilibrium temperature of titanium chrome yellow coating was 23.1 ℃ and 10.6 ℃ lower than contrastive samples and the same filler content of iron oxide yellow respectively. Thus, influence of heat resistance was impressive. Compared with traditional iron series pigments, cool pigments are more suitable to be applied to building energy-saving coatings. Therefore, cool pigments are of certain practical application value and significance. Proper content of the cool pigments is 20% when applied.