Medical Care Information Extraction and Data Collection is a tool and a bridge to convert traditional analog data into digital data. It employs statistical extraction method to deal with high dimensional data, non-liner data and non-Gaussian data, enabling better and more accurate forecast. The driving engine of the medical care information extraction and data collection discipline works with the transmission from assumption-driven scientific way of thinking to data-driven problem extraction method, and the challenges are diversity of medical care data, and complicity of the analysis process, and incomplete standard system. The hospital will benefit from it in regard to integration of hospital overall information resources and a higher level establishment of information.