Management has become as the significant part of our society and it is also one of the most important human activities. The field of management grew in our society during from the time human beings began in the form of social organizations to achieve the goals they could not accomplish as individuals, managing has been essential to ensure the coordination of individual efforts. A French industrialist named Henry Fayol proposed all managers perform four functions: planning, organizing, leading, and controlling that. As the development of society on group effort, and as many organizations have become large, the task of managers has been increasing in importance and complication. That’s why, this essay is going to describe and discuss about this four functions.