The invention discloses an abnormality diagnosis system for a linux vehicle-mounted system in a vehicle engineering field, and the system comprises a linux vehicle-mounted entertainment system, a WEB server, and a PC end. The linux vehicle-mounted entertainment system is the master control core, and comprises modules: remote monitoring service, core dump service, log management service, SSH service, USB protocol stack, HTTP service, TCP/TP protocol stack, USB drive, WIFI drive, 3G drive, USB driver, WIFI module and 3G module. The WEB server is used for building the remote connection between a vehicle owner and a PC. The PC end provides a client, which is used for receiving an abnormality log, for a developer. The system carries out the storage of the abnormal states through employing the core dump technology of linux, achieves the remote connection and automatic uploading of the abnormality log through employing the technologies of wifi and 3G, and reports the abnormal state to the developer for analysis in the first time to maximum degree. The system and method can be used in a vehicle-mounted control system.