The invention discloses a falling alarm system and a falling alarm method for an intelligent crutch. The falling alarm system for the intelligent crutch comprises a collision sensor, a control module, a power source device, an alarm device and a touch sensor, wherein the touch sensor is arranged at the position of a hand shank of the crutch, and the control module is respectively connected with the collision sensor, the touch sensor and the power source device. The control module collects a collision intensity signal and detects whether the touch sensor produces a touch signal or not. Only when the touch sensor does not feel a touch state and the fact that collision intensity data of the crutch falling to the ground can reach a preset threshold value is judged, is a control signal sent out to trigger the alarm device, wherein the collision intensity data are received by the collision sensor. The falling judgment is accurate and the situation of misinformation is avoided. According to the intelligent crutch with the alarm system adopted, due to the fact that liquid metal such as mercury does not exist in a crutch body, risks of leakage of toxic substances are avoided, and use safety is high. In addition, the invention further discloses the intelligent crutch with the alarm system adopted.