The present invention provides a system, method and article of manufacture for personal catalog and knowledge management. The system includes a data collection module for collecting data from a visible data source, a data classification module for classifying the data, a data commentary module for adding value to the data and for providing comment on the data, and a data access module for accessing the data in a storage device. The present invention avoids disadvantages of lacking effective management for personal massive information and can be applied in various data sources. The information can be effectively transferred to personal useful knowledge and further managed by data classification and adding value to the data.