Since the short-term interest rates change dramatically from 2001 to 2003, with the context of this paper uses the interest rate model of Heath , Jarrow, and Morton(1992), we take a winbond-principal guaranteed note issued by security corporation as an example and derive the closed-from solution for this note. We show this note can be synthesized by buying domestic pure discount bonds and buying bull call spread. Furthermore, we also derive the dynamic hedging strategy for principal guaranteed note. Finally, using the implied volatility obtained by call warrant with the same underlying asset, our numerical result is close to the market value.