This invention is a contact method for advertisements. All the advertisements whose purposes are to sell products, services and cooperations are grouped into different classes according to their categories. After some systems which are based on classes are created, organize them into a contact system of advertisement. At same time, all the advertisements whose purposes are to require products, services and cooperations are treated in the same way. For the selling and requiring contacts of advertisement, their divided classes are same completely, so the selling and requiring advertisements in same class are contacted with each other. This advertisement contact system uses the contact card as its contact unit. |