A system and method of measurement and processing of physical variables, and in particular electrical variables, comprising: a multimeter to measure multiple electrical variables, similar to any conventional multimeter; a microcomputer capable of the numerical processing of variables, storage and communication; a conventional computer that can read magnetic or optical storage media, or alternately, be connected to the Internet; an Internet website of public access to users of said multimeter; an Internet server which runs mathematical processing software to carry out graphical and numerical analysis.