Foreign trade is called overall exchange of goods and services between some country and overseas and ultimate goal of every country is that its available goods are exploited sucessful and on that way production, employement and standard of living are increased. One of foreign trade modern theories is economy theory the production volume which explain law of decreasing costs and increasing yields on way that it claims that producers shall increase their prodution until increase decreases average costs. In order that system of foreign trade exchange could function, Word Trade Organization is created. World Trade Organization is international organization which presents institutional and legal framework of multilateral trade system in areas of duty, goods trade, services, intellectual property. It acts in sphere of creating rules in international trade, which are agreed by WTO agreements with aim to ease trade between member states. Also it ensure, with negotation between members, further processes of trade liberalization and tries to create fair system whereby araised trade disputes would be settled. WTO is founded and official started with work at 1. January 1995. Headquaters of organization is in Geneve (Switzerland) and in total it has 153 member states. Republic of Croatia is member of WTO from 30. November 2000. By membership in WTO there is an increase of export which is precondition for keeping macroeconimic balance and further growth of all other real economy activity indicators. Also, Republic of Croatia by membership become part of organized mechanism for trade disputies solution. At the same time, foreign investments and funds are attracted to Croatia.Another advantage is that Croatia opened it economic resources to systems of WTP members from all around the world or business people from whole world have chance to bought, sell and invest in Croatia. Implementation aim of such idea is to export as much as possible and import less as possible. In other words, aim is to buy foreign goods less as possible and produce and export our goods and on that way to raise living standard of Croatian citizens.