Fly ash SO3 content detection system and method

The invention discloses a fly ash SO3 content detection system which comprises a constant-temperature heating magnetic stirring device, a beaker with a built-in fly ash sample, a titration device, a conductivity electrode, a moving device and a control system, the beaker is placed on a stirring table of the constant-temperature heating magnetic stirring device, and a stirrer of the constant-temperature heating magnetic stirring device is located in the beaker; the titration device is arranged above the beaker, and a barium chloride solution is dripped into the beaker by the titration device; the moving device is located above the beaker, the output end of the moving device is connected with the upper end of the conductivity electrode, the lower end of the conductivity electrode extends into the beaker, and the conductivity electrode is electrically connected with the conductivity meter; the titration device, the moving device and the conductivity meter are electrically connected with the control system respec