1. A management system for a storage system, the storage system including a computer that executes data processing; a storage apparatus that provides a storage area for data processed in the computer; a plurality of file systems each of which enables the computer to input and output data from and to the storage apparatus per file unit; a storage control device in which a plurality of file sharing environments that enable a plurality of users to access a plurality of files managed by the file systems from the computer are constructed; a first communication network that communicably couples the computer to the storage control device; and a second communication network that communicably couples the storage apparatus to the storage control device, the management system comprising: an average maintenance interval calculating part to calculate an average maintenance interval that is an average value of time intervals at which an operation command is given to each of the file sharing environments; a management difficulty calculating part, for each of the file sharing environments, to calculate a management difficulty that is an index quantitatively showing a difficulty to manage the file sharing environment and is determined based on a type and a quantity of resources included in the file sharing environment; a file sharing environment usage degree calculating part to calculate a file sharing environment usage degree that is an index showing a degree of usage of each of the file sharing environments and is determined based on an access frequency that is an index showing a frequency at which the users access the file sharing environment and the number of users who access the file sharing environment; a processing content keeping part that keeps numerical ranges and processing contents in association with each other, the numerical ranges being defined in advance respectively for the average maintenance interval, the management difficulty, and the file sharing environment usage degree, the processing contents being defined respectively for the average maintenance interval calculating part, the management difficulty calculating part, and the file sharing environment usage degree calculating part, in association with the numerical ranges; a management object storing area that keeps each of the file sharing environments and the processing content in association with each other, the processing content kept in the processing content keeping part; and a processing content executing part that executes the processing contents kept in the processing content keeping part in association with each of the file sharing environments.