The invention discloses a multi-resource cooperative control method and system for an extra-high voltage AC/DC receiving-end power grid, and the method comprises the steps: obtaining available controlmeasures in a to-be-coordinated power grid, and determining the control quantity of each control measure; performing the priority arrangement of the control effect of the control measures according to a constant step size gradient descent method, and selecting the optimal control measure of each step; sequentially carrying out safety constraint verification on the optimal control measure of eachstep; if each step meets safety constraint verification, generating a cooperative control scheme of the to-be-coordinated power grid according to the optimal control measure of each step until the system is restored to be stable. According to the method and the system, the priority of the available control measures is determined, the control measures are selected, the safety constraint verification is carried out, and a control measure scheme with low cost is obtained under the condition of ensuring operation safety; on the premise of ensuring the operation safety of the power grid, the load shedding amount is reduced to a greater extent, and the safety defensiveness of the system is improved while a multi-resource cooperative control method is provided.