AI industry in Shenzhen has been fighting against COVID-19 epidemic by taking full advantages. The existing researches show that the complete chain fighting against COVID-19 is composed by research and elimination of virus，virus transmission control，disease monitoring，patient treatment，epidemic investigation and warning. The AI enterprises in Shenzhen are closely around the chain，speed up the layout of the intelligent chain，and then create a number of characteristic typical innovative application cases in each link and scene of the chain，which effectively helps fight against COVID-19 epidemic work of the whole city and even in the word. Facts have proved that the foundation of science and technology industry in Shenzhen has become a hard core force for the success of fighting against COVID-19，and the application of fighting against COVID-19 scene has become a major opportunity for industrial development，which is a good experience for the integrated development between fighting against COVID-19 chain and intelligent chain.