The invention discloses an online development method for a load recovery strategy considering transient and static constraints. Firstly, based on the initial mode safety and stability assessment results, a load recovery strategy is optimized, and then the recovery strategy is corrected based on the optimized and stable safety assessment results. The corresponding system is also disclosed. The method and system can perform online development of a load recovery strategy considering transient and static constraints, give a control strategy with a smaller economic cost, larger load recovery amountand faster load recovery speed under the premise of ensuring the security and stability of the power grid, and meet the requirements of load recovery control for economy, timeliness and safety in thelate stage of UHV DC fault handling.