A method and system for determining driving concentration which is capable of analyzing a driver's driving concentration on the basis of variation of a steering angle and driving status information of a vehicle acquired from a front camera sensor. The method includes storing output data of a steering angle sensor and a front camera sensor mounted in a vehicle at a predetermined time interval, calculating a quantitative index include a value for recognizing a vehicle status based on information stored in a storage unit, statistically processing the calculated value to output status information which is an index for determining driving concentration, and comparing the information calculated in the statistically processing to the predetermined reference data and determining the driving concentration according to the comparison result.