The invention discloses a voltage source converter type high voltage direct current transmission active open loop control method and system. The method comprises the steps that active power is realized through open loop control, and the calculation formula of the reference current of active power open loop control is described in the description; Ps<*> is the active power reference value; Us<*> isthe alternating current voltage reference value; icd> is the reference value of the output current d-axis component of a converter; alternating current voltage control is realized through a closed loop, and the calculation formula of the reference current of alternating current voltage closed loop control is described in the description; icq> is the reference value of the output current q-axis component of the converter; GAC is an outer loop alternating current voltage controller; and Us is the voltage of a PCC bus.