The invention discloses an achievement method for a direct current centralized control center applied to large-scale direct current output. An installation state information acquisition device is arranged on a transmission section, acquired parameters are updated to the direct current centralized control center, and the direct current centralized control center calculates and analyzes the acquired data and sends a control instruction to each convertor station to achieve centralized and unified regulation and control of multiple direct current systems. The achievement method for the direct current centralized control center applied to large-scale direct current output changes a traditional centralized control scheme, achieves acquisition and application of on-line state information, further improves a traditional design scheme, provides an important guide function for practical power grid operation, and is favorable for improvement of safety of practical power grid operation.