The invention discloses a method of monitoring a storage battery operation state and an apparatus thereof. The method comprises the following steps of monitoring a voltage of each monomer cell respectively; acquiring a voltage upper limit threshold of each monomer cell respectively; determining whether the voltage of each monomer cell exceeds the corresponding voltage upper limit threshold respectively; and if there is the monomer cell whose voltage exceeds the voltage upper limit threshold in a storage battery, emitting an alarm prompt so as to prompt the storage battery to carry out open circuit. In the correlation technology, by using a method of determining whether the storage battery is in an open circuit state, misjudgement is easy to generate. In the invention, the above technical problem is solved.