1. A spiking neuron-based working memory device, comprising: an input interface configured to convert input spike signals into respective burst signals having predetermined forms, and output a sequence of the burst signals, the burst signals corresponding to the input spike signals in a burst structure; and two or more memory elements (MEs) each configured to receive a different one of the burst signals, store a feature corresponding to the received burst signal, and continuously output a spike signal corresponding to the stored feature but not identical to the received burst signal.