Abstract. The concept of readers participating in the selection of library materials has been around for some time, but in recent years, with the the popularity of smart mobile phone, new opportunities for patron-based selection have emerged. In this paper, we propose a patron driven acquisitions mode via mobile crowd sensing in the support of Social ,Local and Mobile technologies that named SoLoMo in short. Explored the usage of SoLoMo technologies such as participatory sensing, crowd sourcing, social recommendation, based on WeChat platform, we propose and develop a mobile application named RDASLC to collect readers' need. First, we illustrates the development process of collection development mode, then introduced the state of art of mobile library information services, especially focusing on four SoLoMo technologies: mobile crowd sensing, crowd sourcing, participatory sensing, public application development technology. The body of this paper describes in detail the analysis and design of PDAWA , emphasized to elaborate the overall framework of PDAWA, and clarifies the design thinking of simplify readers input operation and cover the needs of all readers, then analyze the three core foundation components of PDAWA, including: Bibliographic information databases, data analysis module and purchase order generation algorithm.