Solid oxide fuel cells (SOFCs) can effectively convert the chemical energy of fuels into electricity at an efficiency up to 60%. They typically operate at high temperature (800-1000oC) resulting in high costs, materials compatibility and durability challenges. Developing SOFCs that can work at intermediate temperature (500-750 oC) has thus been attracting considerable attentions. The performance of the cathode is the largest hurdle to the full realization of low temperature SOFCs. In the first part of this talk, we will introduce our recent studies on novel perovskite catalysts for highly efficient oxygen reduction reaction in SOFCs. Development of highly active and cost-effective electrocatalysts is central to the large-scale electrolysis of water for hydrogen production. Perovskite oxides are also found to be a group of promising candidates to lower the oxygen evolution reaction (OER) barriers in water splitting, and further improvement of their activity and durability are necessitated. In the second part, we will introduce our recent work on perovskite materials as high performance electrocatalysts in water splitting for hydrogen generation, which actually provides clean fuel for SOFCs.