The term sociology is a combination of two words, Socius and logos, meaning the society and education respectively. So a simple etymological sense of sociology is the science of society. Sociology is a social or behavioral science from the 19th century in Western Europe; His main concern is to discover the basic laws and principles of human social life, the social world, operation and regulate the development of society and its institutions. It grew out of the great revolutionary context, with great concern to meet social changes, confusion and problems of the modern world.
Micro-sociology studies of the micro aspects of human society, which is the social processes and phenomena occurring on a small scale; macro-sociology studies macro aspects, ie, the overall structure, operation, modification, development processes and social phenomena on a large scale level. The six major filed of study in the sociology of social organization and social theory, social change, social problems, social processes, social groups and social control.

Studying sociology gives us sociological imagination, an illuminating way of understanding the forces and factors that affect our lives as individuals, groups, communities and nations. Sociology gives us a lot of practical benefits and contribute significantly to addressing societal problems today.
Research is very important in sociology. Although some days in his academic status, uses scientific methods to produce, store and disseminate scientific knowledge about society and social phenomena. A typical sociological research may involve seven steps, and each step is very important and must be followed carefully to standard and do quality research.

Sociology is not an island; It depends on each of the other sciences; and related topics are more or less similar to other social or behavioral sciences, such as anthropology, social psychology, political science, economics and social geography. As his methods, focus, learning unit, and approaches, it is different. The closest discipline to sociology social anthropology; they have the same historical development, concepts, theories and methods; although the first focuses on modern society and quantitative research and the latter focuses on traditional societies and qualitative research techniques.