National Institute of Business is known as a professional public institution of Business Administration. This institute was reestablished in 1979 by the Ministry of Commerce, named "School of Central Commercial Technique". Its mission was to train government officers in order to transmit additional business knowledge only for 6 months.

Since 1985, while the national economy was changing the policy from central planning to free market economy, the school reformed the training system from short term to long term- certificate to diploma level within 2 years course and the school's name was also changed to Secondary School of Business (SSB) and put under the Ministry of Education Youth and Sports in 1994.

Under the government policy of developing human resources of higher education, in 2001 SSB was then changed again to National Institute of Business (NIB) under sub decree No. 108 GnRk>bk dated October 24, 2001 that signed by Samdach Hun Sen, Prime Minister of the Cambodian Royal Government. Now the NIB can both offers diploma and bachelor degree. So far it has attracted high school students, government and Non government officers to enroll.

So far, the institute has trained thousand of students, that most of them have worked for the government and non-government organization, industrial, manufacturing and other private companies.

Nowadays, the school is making significant improvements, both in qualitative and quantitative terms, on its equipment. Such improvements are made to properly support the implementation of its new curriculum. Its sole objective is to empower the school's clients, the students, with the practical know how indispensable for problem solving/critical thinking and hence to be accepted in a job position in a private company and keeps it.

Mission
NIB’s mission is to dedicate itself and to professionally educate and train those in challenging careers in three main fields of business - Accounting and Finance, Business Management, Sales and Marketing by fostering individuals in defining and fulfilling their success in career and life goal.

Vision
According to the government policy of developing human resources-aiming at maximizing available human capital, the NIB is now offering both diploma and bachelor degree programs in the three fields of Business Administration under the TVET system. It is a Competency Based Training (CBT) program supporting the school client’s desires/inclinations in their business career paths. It uses a Credit System providing them with opportunities to start from low level and growing up to higher ones-saving credits to match the National Standards-working towards a bachelor and master degree.