On the basis of the estimation method of varying coefficient model with measurement errors， we estimate coefficient function without assuming any error structures. Then， according to Boston housing data ， we use the varying coefficient model with measurement errors to fit these data with validation methods. There， we use a small part of housing data accurately measured to verify other data measured with errors. The final fitted results also can explain the fluctuation trend of the median housing price very well. And in practical applications， validation method can handle complex error structure models and save much costs.