Abstract: This study focuses on exploring the dynamic acquisition of organizational legitimacy in multinational corporations through innovation networks based on standard competition and cooperation. A vertical single case study was conducted on Huawei Technology Co., Ltd., a leading enterprise in the new generation of information technology industry, to explore the internal and dynamic mechanisms of obtaining the legitimacy of innovative networks based on standard competition and cooperation. Research has found that, The innovation network model based on standard competition and cooperation constructed by multinational enterprises at different stages of standard internationalization is triggered by the institutional logic of "professional logic, market logic, community logic, and national logic" of the focus legitimacy evaluator, presenting "utilization standard competitive-cooperative innovation network—exploratory standard competitive-cooperative innovation network—dominant standard competitive-cooperative innovation network—autonomous and controllable standard competitive-cooperative innovation network" . The utilization standard competitive-cooperative innovation network constructed by Huawei in stages based on standard competition and cooperation, as well as the formed standard tracking capability and network orchestration capability obtained from network resource assessment, are the internal mechanisms for multinational enterprises to dynamically obtain regulatory legitimacy. The exploratory standard competitive-cooperative innovation network based on standard competition and cooperation built by Huawei, as well as the capability to integrate standards, arrange network resources for migration, and lead cooperation, are the internal mechanisms for multinational enterprises to dynamically obtain normative legitimacy. The dominant standard competitive-cooperative innovation network built by Huawei based on standard competition and cooperation and the formed standard dominant capability, network orchestration capability obtained from network innovation resource exclusive, and competition dominant competition and cooperation capability are the internal mechanisms for multinational enterprises to dynamically obtain cognitive legitimacy. The autonomous and controllable standard competitive-cooperative innovation network built by Huawei based on standard competition and cooperation and the formed standard independent and controllable capability, stable network arrangement capability, and balanced competition and cooperation capability are the internal mechanisms for multinational enterprises to dynamically obtain new legitimacy after transition. The core competency level and integration depth formed by innovation networks based on standard competition and cooperation in different modes are dynamic mechanisms that cross legitimacy thresholds. The two low-level core competencies formed during the 1G and 2G periods are dynamic mechanisms for breaking through regulatory legitimacy thresholds in the early stages of standard internationalization. During the 3G era, three types of mid-level core competencies were formed, and the low degree of integration of capabilities was a dynamic mechanism that broke through the threshold of normative legitimacy. The three high-order core competencies formed before 4G and 5G present a dynamic mechanism of moderate integration of capabilities that breaks through the threshold of cognitive legitimacy. The three high-order core competencies formed in the post 5G era exhibit a highly integrated capability, which is a dynamic mechanism for breaking through the new legitimacy threshold after the transition. This study analyzes the process mechanism of multi-stage legitimacy dynamic acquisition and threshold crossing under the background of standard internationalization, providing important insights for the new generation of information technology industry multinational enterprises to use innovation networks based on standard competition and cooperation as legitimacy acquisition strategies.