The invention discloses a camera distance measuring method and 
system. The 
system comprises an 
image sensor unit, a lens unit, a lens driving device unit, an automatic focusing unit and a 
gyroscope unit. The method mainly comprises the following steps: 1, calibrating a codon value-
object distance table, namely, calibrating the codon value (input parameter of the lens driving device unit)-
object distance table under three groups of different postures (horizontal posture, overlook posture and elevation posture) as requirement; 2, automatically focusing a target object to obtain the codon value of the current lens driving device unit; 3, acquiring the overlook angle and the 
elevation angle measured by the 
gyroscope unit; and 4, calculating the actual distance to the target 
object based on thecodon value, the overlook angle and the 
elevation angle of the lens driving device unit. The method and the 
system can be compatible to various smart devices, such as a 
smart phone, a 
laptop and thelike; in addition, the 
gyroscope unit is introduced, so that the problem that different measuring postures lead to different measuring values can be solved, as a result, the result accuracy is improved.