An x-ray diagnostics method is specified, in particular for use in angiography and cardiology, by means of which a particularly good image quality can be achieved in an easily manageable manner for the patient (P) and the medical personnel, at the same time as a comparatively low radiation exposure. Furthermore, a specific x-ray device (1) for implementing the method comprising an x-ray emitter (2), an x-ray detector (3) and a control unit (10) is specified to control the x-ray emitter (2). In this way the control unit (10) is allocated an operating element (15), by means of which a control parameter (S) characterizing the image quality, the detector input dose or the contrast noise ratio can be continuously varied, as a function of which a number of recording parameters (U,I,t,F) are set by means of the control device (10).