It divides part one and part two In part one, it shall indicate how the process of behaviour economic field develops, then I shall show what methods are used to measure behavioural economy. Next, I shall indicate what the main two categories of behavioural economy are as well as I shall explain what risky and uncertain outcomes of individual behavior economic theories are as well as what behavioral game theory is. Finally, I shall explain how policy makers or decision makers can apply behavioral economy concept to do whose policy decision as well as I shall also indicate why behavioral economy and psychology which has close relationship to influence consumption of decision.