A cloud-configuration storage system configured to connect to one or more cloud service provision systems providing a cloud service (laaS), the system comprising: a client apparatus and a server apparatus, the client apparatus comprising a cloud connection information reception part configured to receive from the user a cloud connection information referring to information necessary for using the cloud service for constructing a cloud environment, a configuration storage processing part configured to receive designation of the cloud environment to be stored, and a configuration history display processing part configured to perform display control of a configuration history of the cloud environment being stored, the server apparatus comprising a cloud connection information part configured to store and register the cloud connection information received by the cloud connection information reception part of the client apparatus in a cloud connection information DB, a configuration information acquisition processing part configured to acquire the cloud configuration information constructed in the cloud service provision system from the cloud service provision system according to a cloud configuration information acquisition request from the configuration display processing part of the client apparatus, a cloud configuration history DB configured to store the configuration information being acquired as a configuration history information (70,80), and a configuration history acquisition processing part configured to acquire a configuration history information (70,80) from the cloud configuration history DB, wherein the configuration storage processing part having received a cloud configuration storage command from the user is configured to extract a cloud ID for acquiring cloud configuration information from the cloud configuration display request command, and transmit the configuration display command of the extracted cloud ID to the configuration information acquisition processing part, wherein the configuration information acquisition processing part is configured to acquire a cloud connection information from the cloud connection information DB based on the cloud ID, specify a cloud service provision system acquiring the cloud configuration information based on the acquired cloud connection information, and acquire the cloud configuration information from the specified cloud service provision system and store the information in the cloud configuration history DB, and wherein the configuration history display processing part is configured to acquire a configuration history from the configuration information acquisition processing part based on a cloud information whose configuration is to be displayed received from the user, generate a cloud configuration diagram (1a,1b) using a configuration component icon corresponding to each configuration element and a connection information based on the configuration history being acquired, and display the cloud configuration diagram (1a,1b) being generated on the screen. a cloud connection information reception part configured to receive from the user a cloud connection information referring to information necessary for using the cloud service for constructing a cloud environment, a configuration storage processing part configured to receive designation of the cloud environment to be stored, and a configuration history display processing part configured to perform display control of a configuration history of the cloud environment being stored, a cloud connection information part configured to store and register the cloud connection information received by the cloud connection information reception part of the client apparatus in a cloud connection information DB, a configuration information acquisition processing part configured to acquire the cloud configuration information constructed in the cloud service provision system from the cloud service provision system according to a cloud configuration information acquisition request from the configuration display processing part of the client apparatus, a cloud configuration history DB configured to store the configuration information being acquired as a configuration history information (70,80), and a configuration history acquisition processing part configured to acquire a configuration history information (70,80) from the cloud configuration history DB, extract a cloud ID for acquiring cloud configuration information from the cloud configuration display request command, and transmit the configuration display command of the extracted cloud ID to the configuration information acquisition processing part, acquire a cloud connection information from the cloud connection information DB based on the cloud ID, specify a cloud service provision system acquiring the cloud configuration information based on the acquired cloud connection information, and acquire the cloud configuration information from the specified cloud service provision system and store the information in the cloud configuration history DB, and acquire a configuration history from the configuration information acquisition processing part based on a cloud information whose configuration is to be displayed received from the user, generate a cloud configuration diagram (1a,1b) using a configuration component icon corresponding to each configuration element and a connection information based on the configuration history being acquired, and display the cloud configuration diagram (1a,1b) being generated on the screen.