The invention discloses a quantum communication method and system for terminal delay selection, and the method comprises the steps: carrying out the measurement operation of particles of a sending terminal, and obtaining a first measurement result; performing unitary transformation corresponding to the first measurement result on the particles of the receiving edge node; sequentially performing Htransformation and measurement operation on the particles of the non-target receiving terminal to obtain a second measurement result; and carrying out unitary transformation corresponding to the second measurement result on the particles of the target receiving terminal, and recovering the to-be-transmitted information. Visibly, according to the scheme, under the condition that the receiving terminal is not completely determined, the particle state can start the transmission behavior, the receiving edge node can select the receiving terminal while the particle state is in channel transmission,and after the final receiving terminal is determined, the particles have transmitted most paths, so that the time delay is effectively reduced, and finally information receiving is completed. The quantum communication process of selecting the terminal is delayed under the condition that the terminal is uncertain, and the information transmission efficiency is improved.