Happiness is subjective. It is difficult to compare one person�s happiness with another. It can be especially difficult to compare happiness across cultures. The function of man is to live a certain kind of life and this activity implies a rational principle. The function of a good man is the good and noble performance. If any action is well performed it is performed in accord with the appropriate excellence. If this is the case, then happiness turns out to be an activity of the soul in accordance with virtue. That is happiness as the exercise of virtue. Every human being thinks happiness in his own perspective. Everyone wants to be happy and searching happiness in all their activities. Happiness is typically measured using subjective measures. Happiness cannot be defined in terms of rigid boundaries and it is a vague term and it is appropriate to use Fuzzy Logic. In particular, we use Fuzzy Cognitive Mapping to find the key motive of happiness. This paper consists of four sections. The first section is of inductive nature about happiness. The section two introduces the concept of Fuzzy Cognitive Mapping (FCMs). In section three Fuzzy Cognitive Mapping applied on the concept of Happiness. Section four gives the conclusions and suggestions.