MoTurk contains three stakeholders, researchers, users and MoTurk server respectively.In the study setting stage, researchers will be able to create studies with specific research needs including types of data(mobility data, conversation data,etc.), requests for participants(age, occupation, etc.) and expected data granularity, sampling and data processing methods. Evaluations concerning privacy sensitivity and battery impact are also generated in this stage as a reference for price making.After a study has published, it will be pushed to the server and users who are qualified for this study are able to see it through MoTurk App on mobile phones. When viewing interested studies, users will be fully access to the information researchers created including basic information, required personal data, price and evaluations. When they finally choose to start this study, the data collecting stage automatically begins. their data begin to be collected and processed . All data will be updated and presented to both researchers and users with a 24 hour interval. Users will be paid at the end of studies.