This university has published the "MMDAgent" voice interaction system toolkit as open source software. Voice Interaction Agent, produced using MMDAgent, is active in various scenarios and provides voice interaction capability. Voice interaction agents produced using MMDAgent talk to people by loading a script file that describes a voice interaction scenario. To increase the agent's vocabulary, it is important to describe many voice interaction scenarios. To date, voice interaction scenarios have been described by a small organization. Therefore, they require high costs to describe many voice interaction scenarios. To resolve this problem, we construct a crowdsourcing[1] model for the creation of a voice interaction scenario. In this study, the works of creation of voice interaction scenario are divided and distributed to numerous people via the internet. Furthermore, we provide in this study a tool for creation voice interaction scenario and test operation of voice interaction agent as a web application service. We hereby reduce the cost of installation MMDAgent and provide a comfortable environment for the creation voice interaction scenario.