In the 4th industrial revolutionary environment, in which recently advanced ICT(Information Communication Technology) industry is integrated into a whole society and innovative changes are taking place, the diversity of means of providing financial services is increasing due to the development of the FinTech industry, the use of simple payment services is continuously increasing by the demand of financial consumers to increase demand, and non-financial companies such as telecommunication companies, manufacturers, and etc as well as traditional financial companies are increasingly involved in the simple payment industry. Contrary to the positive development of these financial services, financial IT side effects such as personal information leakage, hacking accidents, and IT disability accidents frequently are occurring, entry of non-financial companies into the FinTech industry and uncertain causes of electronic financial accidents have had a negative impact on the reliability and reliability of FinTech services, financial consumer inconvenience and damage are also increasing. In this paper, we analyze the development factors and main characteristics of the simple payment service, and suggests the institutional improvement plan as an implication for continuous use of simple payment service of financial customers, for the stability of the simple payment service, and for the enhancement of the user protection.