A system for self-diagnosing and error reporting of a software application in a computer system having a plurality of software applications and background processes, the system comprising a diagnosis module configured to collect and monitor usage data of resources of the computer system, execution status of the software applications and background processes of the computer system, and software application error conditions, adjust logging level of log files according to the execution status of the software applications and background processes of the computer system and the software application error conditions, and generate diagnosis advisory based on the usage data of the resources of the computer system and the software error conditions, and a reporting module configured to collect and report the usage data of the resources of the computer system, the log files and the generated diagnosis advisory automatically to a user.