The invention discloses an end-to-end-based large knowledge graph construction and storage method and system. The system comprises a knowledge graph construction system, a knowledge construction module, a knowledge management module, a knowledge application module, a knowledge extraction module, and a processing and storage module. The knowledge graph construction system is in communication connection with the knowledge construction module, the knowledge management module, the knowledge application module, the knowledge extraction module and the processing storage module. The knowledge construction module comprises a knowledge collection module, a knowledge fusion module, a knowledge evaluation module and a knowledge updating module; the knowledge application module comprises a cognition service module, a language understanding module and an inference engine module; the reasoning engine module is in communication connection with the understanding service module and the language understanding module, and the language understanding module is in communication connection with the understanding service module. According to the invention, required data can be obtained more quickly and efficiently; through cooperation of data integration, data cleaning and data updating in the data cleaning and perfecting module and the processing and storing module, quick search is facilitated.