These measures to effectively prevent the large-scale population flow and gathered themselves together, and played an important role in the epidemic prevention and control, but at the same time also inevitably to the photovoltaic enterprise production and operation, power plant construction, such as global trade bring certain influence. Although under the policy adjustment, the overall pv market fell, but the benefit from the growth of the overseas market, solar portal, monitoring and control system working principle of the photovoltaic industry in China and steadily expanded, technology innovation constantly improve, improve export growth. But we believe that the monitoring system diagram with the photovoltaic industry indomitable resilience and unsettled adjustment ability, flexible solar portal, we will be able to overcome difficulties, silicon wafer production enterprise by minimizing the impact on the industry of solar panels, and again in 2020. In 2020, the outbreak of a sudden, and to prevent and control the outbreak, monitoring and control system working principle of the related departments to take the extended holiday, traffic control, monitoring and control system principle diagram temperature monitoring screen and so on many national measures in public places. Back in 2019, qian xuesen system engineering theory what heat storage medium is the pv industry in China began to implement driven by subsidies to parity drive. At present, solar power network, the country is in the midst of a severe pneumonia in view of the new champions in the struggle, silicon wafer production enterprises of the national people's unity is strength, united to fight the new crown pneumonia, China solar energy network, therefore, the photovoltaic industry development in 2019 to review and outlook of 2020 conference using the online sharing way.