Market maker system is a trading mechanism with market maker creating market liquidity.It is established and developed to adapt to the needs of the OTC market，and it plays an important role in market stabilization，market creation，formation of the reasonable price and efficient allocation of social resources.This article analyzes the OTC market system，status and the background of the formation.The main reasons for the slow development of market maker system are as follows：the lack of supporting laws and regulations，and effective market mechanisms；none cost recovery mechanism established in the market；and the missing of market makers training in relevant areas.Furthermore，we put forward some suggestions for the development of OTC market，such as relevant regulations amending，entry establishing，exit and regulatory of market maker system and cost compensation mechanism，market maker positions adjusting and the split units of equity trading.