This study aims to establish a method to discover ferroptosis drugs targeting the SLC7A11/BECN1 interaction based on live-cell quantitative fluorescence resonance energy transfer (FRET) imaging. In MDA-MB-231 cells, Imidazole Ketone Erastin (IKE) treatment induced ferroptosis verified by an 80% increase in Fe2+, a 38% increase in MDA, and a 53% decrease in GSH. Western blotting, protein co-localization analysis, and quantitative FRET microscopy collectively demonstrated that IKE promoted cytoplasmic interaction between SLC7A11 and BECN1 in living cells, resulting in decreased SLC7A11 protein levels, indirect inhibition of GPX4 activity, and ultimately ferroptosis induction. Gene manipulation experiments confirmed that SLC7A11 inhibited IKE-induced ferroptosis while BECN1 promoted IKE-induced ferroptosis. These results indicate that the interaction between SLC7A11 and BECN1 represents a viable target for ferroptosis regulation. Five drugs (IKE, SOR, LAP, LIN, ML162) were used for FRET drug screening. In MDA-MB-231 cells, IKE, SOR and LAP significantly promoted the interaction between SLC7A11 and BECN1 (EDmax was 0.47 ± 0.02, 0.34 ± 0.02, 0.30 ± 0.03, respectively) compared with the control group (EDmax was 0.16 ± 0.01), while LIN and ML162 had no effect (EDmax was 0.19 ± 0.02, 0.14 ± 0.01, respectively). In MCF-7 cells, the EDmax values of the control, IKE-, SOR-, LAP-, LIN-, and ML162-treated cells were 0.17 ± 0.04, 0.40 ± 0.01, 0.31 ± 0.01, 0.21 ± 0.01, 0.17 ± 0.01, 0.17 ± 0.02, respectively, consistent with the previous results, indicating the accuracy and effectiveness of this method. In summary, the SLC7A11/BECN1 interaction-based FRET imaging provides a quantitative method for the discovery of ferroptosis drugs in living cells.