In general, antibody IgM appears earlier after infection, positive result can be used as an indicator of early infection. Antibody IgG appears later and maintain for a long time, positive result can be used as an indicator of infection and previous infection the nucleic acid detection, especially for the further diagnosis of patients with negative PCP of SARS-COV-2 Antibody Test Kit (Colloidal Gold) can be used as an auxiliary and supplementary results It can assist diagnosis, treatment and prevention of the novel coronavirus infection effectively.