In the world of sustainable design and green building, air-conditioning energy consumption has always been said to occupy 40% of overall energy consumption. Key energy savings measures are focused on reducing air-conditioning cooling load and selecting highly efficient systems. Sustainable Solar energy earns escalating popular as solution for Net-Zero Energy Building (NZEB). Power air-conditioning system by solar energy is obviously the ideal solution. Of course, manufacturers have been exploring this product. Designers have also tried solar air-conditioning system. But why success story on solar air-conditioning system has rarely been presented ?