The external cavity time-delay signature (TDS) is a critical parameter influencing the application of chaotic lasers. This study presents a method for enhancing the TDS of chaotic light output from a semiconductor laser with loop feedback by injecting it into a whispering-gallery mode microcavity. By utilizing the storage effect, attributed to the long photon lifetime in the whispering-gallery mode, and the extraction of coherent signal components through the coupling process, significant enhancement of the chaotic light signal's TDS was achieved. An experimental setup was constructed to first explore the influence of the coupling state of the whispering-gallery mode microcavity on the chaotic TDS enhancement. Then, the effect of this approach on the chaotic signal TDS generated under different feedback strengths was studied. The experimental results confirm that this method significantly enhances the TDS of chaotic signals across different feedback strengths, with the enhancement being more significant under critical coupling conditions and low bandwidth. The compact structure and low cost of this scheme offer a convenient solution for the development and application of chaotic TDS-related devices.