The air-conditioning condenser is a key component of air-conditioning equipment. Its elbow connection makes it difficult to apply traditional contact damage detection methods due to various types of damage and complex geometric shapes. This article proposes a non-contact laser ultrasonic guided waves non-destructive testing method based on an energy mapping transfer network. Firstly, the approximate waveforms of the ablation signal and the thermoelastic signal are extracted through wavelet decomposition. An autoencoding energy mapping function is designed to map the thermoelastic signal feature space to the ablation signal feature space. The mapped thermoelastic signal close to the ablation signal is obtained. Then, the feature space of thermoelastic and ablation signals are aligned through the energy mapping transfer network. The network model uses the sum of domain conversion error and sample label error as the feature space alignment error value. Finally, the performance of the proposed method is evaluated through detection experiments on the air-conditioning condenser damage such as leakage, delamination, and cracks. The results show that the damage accuracy of the proposed method is 93. 09% , which is 7. 23% higher than the traditional laser thermoelastic excitation detection method.