Cloud usage assisting apparatus and cloud usage assisting method

The present invention provides a cloud usage assisting apparatus which assists determination of an optimal cloud usage configuration. The cloud usage assisting apparatus calculates changes in performance and cost of a service which are to occur when each of actions is executed and a configuration change is made, based on menu information, storage resource configuration information, and monitoring information, each of the actions being an action in which at least one of the configuration changes of changing of a menu of the storage service involving one cloud, changing of the menu involving different clouds, and changing of a parameter that changes the configurations of the storage resources in the menu are executed on storage resources provided by one or more clouds, and determines the action as a recommended candidate when the action improves at least one of the performance and the cost.