A protocol conversion platform, wherein the platform is applied in a video resource aggregation system comprising a superior data platform and a subordinate data platform, wherein the superior data platform and the subordinate data platform respectively support at least one type of video cascade protocol, the protocol conversion platform comprises at least one superior protocol conversion gateway interfacing with the superior data platform, and at least one subordinate protocol conversion gateway interfacing with the subordinate data platform, wherein the superior data platform supports at least a first video cascade protocol and the subordinate data platform supports at least a second video cascade protocol, the superior protocol conversion gateway is configured for receiving a first instruction under the first video cascade protocol sent by the superior data platform to the subordinate data platform supporting the second video cascade protocol, parsing the first instruction according to the first video cascade protocol supported by the superior protocol conversion gateway, converting the first instruction into a first signaling under a preset third-party signaling standard, and sending the first signaling to the subordinate protocol conversion gateway interfacing with the subordinate data platform; the subordinate protocol conversion gateway is configured for parsing, according to the preset third-party signaling standard, the received first signaling sent by the superior protocol conversion gateway, converting the first signaling into a second instruction under the second video cascade protocol supported by the subordinate data platform that interfaces with the subordinate protocol conversion gateway, and sending the second instruction to the subordinate data platform; the subordinate protocol conversion gateway is further configured for parsing, according to the second video cascade protocol supported by the subordinate protocol conversion gateway, a received third instruction sent by the subordinate data platform, converting the third instruction into a second signaling under the preset third-party signaling standard, and sending the second signaling to the superior protocol conversion gateway, wherein the third instruction is obtained through a result of performing processing by the subordinate data platform according to the received second instruction and is based on the second video cascade protocol; and the superior protocol conversion gateway is further configured for parsing, according to the preset third-party signaling standard, the received second signaling sent by the subordinate protocol conversion gateway, converting the second signaling into a fourth instruction under the first video cascade protocol, and sending the fourth instruction to the superior data platform, wherein when the first instruction contains video resource calling information, the processing is performed by the subordinate data platform according to the second instruction, and a video resource is sent by the subordinate data platform to the subordinate protocol conversion gateway according to the result of the processing; the subordinate protocol conversion gateway is further configured for receiving a video resource sent by the subordinate data platform, and sending the video resource to the superior protocol conversion gateway; the superior protocol conversion gateway is further configured for encapsulating the received video resource according to a video encapsulation format of the superior data platform, and sending the encapsulated video resource to the superior data platform.