Abstract: The concepts and contents of failure research are proposed. The failure information, which included failure objects, failure phenomena and failure environment, could be concluded into five kinds, sixteen classes, and fifty-two species. It could be used to establish failure diagnosis system to diagnose failure mode, reasons and mechanism. It includes failure diagnose, failure forecast and failure prevention in failure research. There are eight problem in failure diagnose. These problems are diagnosing technology and way of fractures and cracks, synthesis diagnosing technology and way of failure, quantify diagnosing technology and way of failure, probability, faintness and brainpower diagnosing technology and way of failure, environment diagnosing technology and way of failure, material capability system and token technology, counting testing and illation of stress technology and way, simulating technology and way of failure. There are prediction and prevention problems in failure prediction and failure prevention fields. These ten problems are investigated from theory and practice in detail. In last, the evaluative trend of failure research is pointed out.

Key words: Contents, Electromechanical equipment, Failure research, Scientific problems