The basic characteristics of Internet economy as a macroeconomic system, such as technological basis of Internet economy, reverse con‑ nections and so-called «critical level» of Internet influence on economy,  specific structure and infrastructure and basic system institutes, are examined in this article. These characteristics define Internet economy as a complicated system, with new quality and peculiar properties. The emergence of new forms of economic relations – Internet economy re‑ lations – comes forward as a result of the Internet economy elements synergetic interaction on different levels of economy.