Nuclear material accounting is a key measure for nuclear safeguard.Software for MUF evaluation in item nuclear material accounting was worked out in this paper.It is composed of several models

including input model

data processing model

data inquiring model

data print model

system setting model etc.It could be used to check the variance of the measurement and estimate the confidence interval according to the MUF value.To insure security of the data multi-user management function was applied in the software.