STEAM (Science, Technology, Engineering, Arts, and Mathematics) has been emphasized in science education of Korea for the last 10 years. When we do science with mathematics, it is no doubt that doing science cannot be completed without mathematics. What about technology and engineering? How can we improve doing science with technology and engineering? How can we differentiate technology from engineering? How can we improve doing science with arts? How can we define ‘arts’ in STEAM? In this study, I will introduce how we can define and apply scientific thinking, computational thinking, and emotional thinking for successful STEAM program.