The invention relates to a sleeping monitoring method and device. The method includes the steps of detecting the state data of a terminal at the current moment; determining the user state at the current moment according to the state data of the terminal, wherein the user state includes the sleeping state and the waking state; counting the user states of all moments, and determining the sleeping conditions of a user. By means of the technical scheme, the method can obtain the sleeping conditions of the user only with the aid of the terminal instead of an intelligent wearing device, the sleepingdetecting cost is reduced, and the user does not need to sleep carrying the intelligent wearing device and can sleep more comfortably.