Abstract: The purpose of this study is to systematically understand the ‘motivation’ process that is psychological basis of why and how people select and learn certain musical activity or study or on the contrary, from what people stops musical activity. To understand the process of motivation that is the origin for musical activity of study, motivation was explained and the factors that is meaningfully relevant to this has been looked over from many point of view and how the relevant factors interact with motivation was analyzed in detail. Each various factor that explains motivation directly interacts with motivation and simultaneously, forming causal relationship with each other and indirectly interact with motivation. For directly relevant factors that affects musical motivation, there are cognitive factors like expectancy-value, self-efficacy, goal orientation and socio-cultural factors like family, school and teacher. Likewise, it is understandable that the motivation to select and study certain musical activity is triggered from complex direct and indirect interaction between various factors.