Harmony search（ HS） algorithm is used to solve low delay and low energy consumption doubleobjective optimization problem in wireless sensor networks（ WSNs）. First

analyze delay and energy consumption model

and establish objective function. Then

use priority-based path encoding scheme to update harmony memory iteratively while searching the optimal path. Finally

simulation of 100-node network is carried out by using Matlab. The results show that in setting up transmission path of WSNs

factors of energy consumption and delay interact

it can be controlled according to different users’ needs of delay and energy consumption.