Valuation of forest ecosystem functions are among the most discussed issues of ecological economics. Doubts, in particular the question how to appreciate cultural functions and ecosystem services in terms of the Millennium Ecosystem Assessment. Ecological economics developed a concept of natural capital to evaluate natural environment elements, ecosystems and ecosystem services and expressed their values in monetary units. The ecosystem services, stressing societal dependance on natural ecosystems, are changing to commodities at the market of the ecosystem services. In this paper we analyse some methods of ecosystem services evaluation. There are two forms of expression functions of forests and forest as an object – monetary and nonmonetary. Monetary valuation of the importance of forest and forest functions as the object is reflected in decisions about the allocation of resources, assessing the effectiveness of alternatives for certain purpose forest management effectiveness of its variants at different levels and in the official valuation of the forest. For those purposes may be accepted in some cases it is necessary to purposefully express also the importance of social functions or site 's functions in the form of money .The requirement that the importance of all forest functions were valued "at all costs" resulting from the socalled philosophy “neoclassical economics”, which promotes the social valuation of forest functions through the willingness of users to pay the effect of the forest. The issue of ecosystem functions valuation, there is abundant scientific literature.