The invention discloses a risk assessment method for a power grid and user bidirectional interactive service operation mode, and aims at solving a problem of risk assessment of the bidirectional interactive service operation mode. The risk assessment method for the bidirectional interactive service commercial operation mode based on a multilevel fuzzy evaluation method is adopted. Firstly, an evaluation indicator system is established; then the weight of each indicator is confirmed by adopting a level analysis method; then an evaluation indicator set is established; and finally secondary fuzzy comprehensive evaluation and primary fuzzy comprehensive evaluation are performed on a target object. The risk assessment method has advantages of being convenient to realize and reliable in result so that the risk value of the interactive service operation mode can be quantitatively calculated, and the obtained results have certain guiding significance for power grid decision makers.