In the article the author researches the complex significance of energy resources as a factor of national security in the context of European integration. The main purpose of the article is to determine the multidimensional concept of ,,energy security”, ,,energy strategy” and interrelationships between them. European Union possesses a solid legislation adopted by the responsible institutions on energy strategy that ensure energy security. Thereby in the article the author analyze the best practices and experience of European Union countries in energy matters, and their reapplication opportunities in Moldova, in order to develop recommendations to diversify energy resources in Moldova by taking effective models.