I believe that you can learn how to dealt personnel psychological challenges in your working environments more easily. Finally, as i am one business psychology, I hope that you can learn how to apply psychology knowledge, e.g. expectancy theory, ERG theory, Maslow's hierarchy, path goal leadership theory, Attribute theory, integration framework, concept of motivation, goal setting theory, organizational cultures and subcultures etc. psychology theories to help manager to predict your staffs behavior to know how who will change whose personnel behavior to solve your management challenges in different working environment more easily. keywords: expectancy theory, ERG theory, Maslow's hierarchy, Concept of motivation, goal setting theory, Attribute theory, path goal leadership theory, organizational cultures and subcultures