This article investigates ways and methods of solving problems associated with the law interpretation, proposed by the European legal scholars in the period of Modern Era. The author states that researchers have advocated the formation of legislation and its interpretation which bases on the principles of natural justice; gives examples of problems in the legislation and its interpretation in Europe of the Modern Era period. The work also emphasizes the influence of European supporters of the natural law theory on the resolution of legal issues through the law interpretation. The extension of views on the natural law contributes to the fact that the European legislation and its interpretation begin to be based on the principles of justice and humanity.