Abstract: Communication equipment comprises a communication section 3 performing communication with other equipment via a public line, a local area network, or an infrared communication network, a resource information storing section 5 storing what format data equipment can handle, a data storing section 6 storing data to be transmitted, a data conversion section 7 converting data so that the other party of communication can interpret it, a conversion table 8 storing whether currently held data can be converted to a form that the other party of communication can interpret, a conversion- means storing section 9 storing actual conversion means, and a negotiation section 10 knowing what the resource information of equipment of the other part is.