Vehicle-to-grid（V2G）technology can fully realize the potential of electric vehicles（EVs）to reduce carbon emissions and increase efficiency in transportation and power systems. However

the effective implementation of V2G technology depends on the public’s willingness to accept the technology

and there are still some research gaps on how to effectively promote the deployment and operation of V2G technology on demand side. In order to comprehensively analyze users’acceptance of V2G technology

considering charging and discharging scenarios

a conceptual framework on the basis of the unified theory of acceptance and use technology model is proposed

and hypotheses are proposed correspondingly. Through questionnaire survey

855 valid questionnaires are collected

including 428 EV owners and 427 potential EV owners interested in purchasing EV. Based on the structural equation model

the total sample is analyzed

and the results show that perceived utility had the greatest impact on respondents’acceptance

and community had a significant influence on respondents perceived altruism. Then

the differences between the two types of respondents are compared and analyzed. The results show that perceived utility and altruism important for EV users to participate in charging and discharging. While potential EV owners are more concerned about incentive conditions and technical reliability. Finally

suggestions are put forward to improve the acceptance of EV users to participate in orderly charge-discharge scheduling policies

which can provide references for the transportation and power systems to deploy and evaluate the impact of V2G technology.