The invention discloses a desensitization system and method for electricity customer data. The method comprises the following steps of: according to multiple kinds of types of to-be- desensitized datain a data source, identifying a rule for a sensitive preset sensitive field, identifying an automatic sensitive field of data in the data source, sending a sensitive field verification signal; according to the acquired sensitive field verification signal, grading sensitivity of data in the data source; configuring parameters for a preset desensitization algorithm according to sensitive data typeand sensitive level, and configuring corresponding desensitization schemes according to different desensitization requirements to desensitize data in the data source to be desensitized so as to meet different desensitization requirements of different scenes.