A computer system comprising: a client terminal which a user uses and a server, the server includes: a storage configured to store living environment information database associated with user ID including living environment information, and advice information database associated with the user ID including advice information and rule of presentation to the advice information; a retrieve module configured to retrieve living environment information related to the user's living environment, the living environment information stored in the storage and associated with the user's ID sent from the client terminal; a determination module configured to determine the user's skin level based on the retrieved living environment information; a selection module configured to select advice information associated with the determined user's skin level among a plurality of pieces of advice information associated with the skin level according to the rule so that the same advice information is not continuously presented, each piece of advice information including advice related to the user's skin care; and a presentation module configured to present the selected advice information on a display of the client terminal; wherein the selection module selects the advice information according to the rule indicating an order assigned to each of the plurality of pieces of advice information. the server includes: a storage configured to store living environment information database associated with user ID including living environment information, and advice information database associated with the user ID including advice information and rule of presentation to the advice information; a retrieve module configured to retrieve living environment information related to the user's living environment, the living environment information stored in the storage and associated with the user's ID sent from the client terminal; a determination module configured to determine the user's skin level based on the retrieved living environment information; a selection module configured to select advice information associated with the determined user's skin level among a plurality of pieces of advice information associated with the skin level according to the rule so that the same advice information is not continuously presented, each piece of advice information including advice related to the user's skin care; and a presentation module configured to present the selected advice information on a display of the client terminal; a storage configured to store living environment information database associated with user ID including living environment information, and advice information database associated with the user ID including advice information and rule of presentation to the advice information; a retrieve module configured to retrieve living environment information related to the user's living environment, the living environment information stored in the storage and associated with the user's ID sent from the client terminal; a determination module configured to determine the user's skin level based on the retrieved living environment information; a selection module configured to select advice information associated with the determined user's skin level among a plurality of pieces of advice information associated with the skin level according to the rule so that the same advice information is not continuously presented, each piece of advice information including advice related to the user's skin care; and a presentation module configured to present the selected advice information on a display of the client terminal; wherein the selection module selects the advice information according to the rule indicating an order assigned to each of the plurality of pieces of advice information.