An electronic hydraulic pressure control apparatus using a variable behavior, comprising: a signal input unit configured to receive a proportional voltage signal of a manipulator with which a user can manipulate a working tool and a mode selection signal related to a behavior mode of the working tool according to a manipulation of a user and output a digital manipulation signal; a manipulation state determining unit configured to analyze the digital manipulation signal, wherein the manipulation state determining unit determines a behavior mode of the working tool to be an abrupt operation behavior mode if the digital manipulation signal is alternately repeated to positive and negative positions with respect to a neutral position by a predetermined number within a predetermined time period, and determines the behavior mode to be a general behavior mode if the digital manipulation signal is continuously maintained in any one of a neutral position, a positive position and a negative position for a predetermined time period, a behavior mode changing unit configured to change a mode to the general behavior mode or the abrupt operation behavior mode according to the behavior mode determined by the manipulation determining unit and the mode selection signal; and a signal processing unit configured to, according to the changed behavior mode, process the digital manipulation signal output by the signal input unit to an integrated digital manipulation signal to be output in the general behavior mode, in which the signal processing unit increases or decreases the digital manipulation signal by a predetermined gain, and output the digital manipulation signal as is in the abrupt operation behavior mode; and a proportional valve driving unit configured to drive a proportional valve according to the signal output by the signal processing unit. a signal input unit configured to receive a proportional voltage signal of a manipulator with which a user can manipulate a working tool and a mode selection signal related to a behavior mode of the working tool according to a manipulation of a user and output a digital manipulation signal; a manipulation state determining unit configured to analyze the digital manipulation signal, wherein the manipulation state determining unit determines a behavior mode of the working tool to be an abrupt operation behavior mode if the digital manipulation signal is alternately repeated to positive and negative positions with respect to a neutral position by a predetermined number within a predetermined time period, and determines the behavior mode to be a general behavior mode if the digital manipulation signal is continuously maintained in any one of a neutral position, a positive position and a negative position for a predetermined time period, a behavior mode changing unit configured to change a mode to the general behavior mode or the abrupt operation behavior mode according to the behavior mode determined by the manipulation determining unit and the mode selection signal; and a signal processing unit configured to, according to the changed behavior mode, process the digital manipulation signal output by the signal input unit to an integrated digital manipulation signal to be output in the general behavior mode, in which the signal processing unit increases or decreases the digital manipulation signal by a predetermined gain, and output the digital manipulation signal as is in the abrupt operation behavior mode; and a proportional valve driving unit configured to drive a proportional valve according to the signal output by the signal processing unit.