Based on posterior probability and "small probability event principle"

for the Bayesian sequential test on variance in complicated hypothesis conditions

the basic assumptions of Bayesian sequential variance test were presented

the Bayesian sequential variance test (BSVT) model was constructed

the algorithms of solving the critical value of sequential test were designed

and for given censored test number

the judge criteria for hypothesis testing were discussed.At last

the solution and application of BSVT model were illustrated with an example.