The invention discloses a quantification gas-solid two-phase flow conveying device. The quantification gas-solid two-phase flow conveying device comprises a material container, a quantification plunger, a material pushing air input port and a material output port, a material containing cavity is formed in the quantification plunger, the quantification plunger can move in a reciprocating mode in the material container, when the quantification plunger moves backwards, the material containing cavity is opened, materials in the material container can fill the material containing cavity, when the quantification plunger extends out, the material containing cavity can be sealed, the material pushing air input port and the material output port can communicate to the sealed material containing cavity, the material pushing air input port can be used for injecting compressed gas into the sealed material containing cavity so that the materials in the material containing cavity can be sent out fromthe material output port. The invention further provides a quantification conveying system. The quantification conveying system comprises one or more quantification gas-solid two-phase flow conveyingdevices, the one or more quantification gas-solid two-phase flow conveying devices can be configured according to specific output quantity requirements so as to meet different use requirements.