Quantum-enhanced sensing has a goal of enhancing a parameter sensitivity with input quantum states, while quantum illumination has a goal of enhancing a target detection capability with input entangled states in a heavy noise environment. Here we propose a concatenation between quantum-enhanced sensing and quantum illumination that can take quantum advantage over the classical limit. Using quantum Fisher information formula, we connect quantum phase sensing in an interferometry with sensing a target reflectivity that we call a target sensitivity. Including thermal noise and loss, we put the target sensitivity into noisy quantum-enhanced sensing. Under the constraint of a total input state energy, for example, N-photon entangled states can exhibit better performance than a two-mode squeezed vacuum state and a separable coherent state. Incorporating a photon-number difference measurement that discriminates the presence and absence of the target distinctly, we enhance not only the target sensitivity but also the signal-to-noise ratio with increasing thermal noise.