Method of controlling electric continuous variable valve timing

The present invention relates to a method for controlling an electronic continuous variable valve timing device to improve the starting performance of an engine by the simple phase control of a cam shaft. According to an embodiment of the present invention, the method for controlling an electronic continuous variable valve timing device is to change the intake air and exhaust timing of the engine depending on the phase of the cam shaft The present invention comprises the steps of: determining whether or not turning off the engine is requested during driving; recognizing the phase of the cam shaft so as to advance the intake air timing of the engine depending on a target phase; and finishing the phase control of the cam shaft depending on the status of the engine or the cam shaft. [Reference numerals] (S110) Detect Driving environments;(S120) Control set timing;(S130) Is an engine turned off?;(S140) Recognize a target starting phase (T_n);(S150) Engine RPM > Minimum RPM (R)?;(S160) Control the advance of a cam shaft;(S170) Phase of the cam shaft >= Minimum advance?;(S180) Phase of the cam shaft = Maximum advance?