The use of behavioural science in government and policy and regulation has been gaining popularity and momentum over the last five to ten years. Applications have historically been related to individual behaviour – either individuals working within government or citizens themselves. However, there is growing interest among governments and policy institutions to utilize behavioural science to enhance organisational behavior – from government institutions themselves to external organisationsthat interact with and are regulated by governments. Organizational Behavior is the identification, analyzing and application ofknowledge about howindividuals and groups act in organizations. It interprets people-organization relationships in terms of the person, group, organization, and whole social system. Objective of it is to build better relationships by achieving people objectives, organizational objectives, and social objectives. It encompasses a wide range of areas, such as human behavior, Training and development, change management, leadership, teams, Group behavior etc. In the study of organizational behavior and diversity, the use of models, theories, and past experience are each helpful in gaining a complete understanding. Individuals within an organization behave as they do as a result of the context in which they are immersed. This short article seeks to examine this context in order to further the cause of helping managers deal with issues in their organizations from a standpoint of knowledge and understanding, rather than guesswork andout-dated methods. First, the organization as a system will be discussed, including its interdependence upon other systems. Next, the importance of relationships as a vital part of the operation of organizations will be mentioned. Then, the management of diversity will be outlined, leading to a discussion of the importance of culture in influencing values. This paper is a theoretical paper with some concept in the behavior organizational as a important part of management.