A computer-readable portable storage medium storing a trouble handling program for causing a computer to execute a process for knowledgizing past trouble handling cases in information systems, and for recommending handling methods based on trouble handling knowledge obtained by knowledgizing and symptoms of troubles when they occurs, comprises: a searching process for obtaining candidates of handling methods for troubles requested to be handled by searching the trouble handling knowledge; a recording process for recording to a storing unit a history of handling methods executed for each symptom as handling history information; a priority assigning process for assigning priorities to the handling method candidates obtained by the searching process, with reference to the handling history information; and a process for returning to a handling request source the handling methods for the troubles requested to be handled after assigning priorities based on priority assignment information obtained by the priority assigning process.