An in-cell touch screen panel, comprising: an array substrate; a plurality of sub-pixels located on the array substrate, each of the plurality of sub-pixels comprising an organic light-emitting device and a sub-pixel circuit electrically connected with the organic light-emitting device, the organic light-emitting device comprising an anode layer, a light-emitting layer and a cathode layer that are located on the array substrate in turn; and a driving chip; characterized in that: wherein the plurality of sub-pixels are grouped into sub-pixel groups of adjacent sub-pixels, each sub-pixel group comprising at least two sub-pixels, wherein the cathode layers of different sub-pixel groups serve as self-capacitance touch electrodes and are independent of one another; and wherein the driving chip is configured to output signals to signal terminals (Scan1, Scan2, Vint, Data, EM, VDD) of each sub-pixel circuit and to the cathode layer of each sub-pixel group, wherein each of the signals output in a touch scanning phase is a superposition of the signal output in a phase immediately preceding the touch scanning phase with a touch scanning signal to be applied to the cathode layers for self-capacitance touch detection such that each sub-pixel circuit operates in the touch scanning phase in the same state as in the phase immediately preceding the touch scanning phase. an array substrate; a plurality of sub-pixels located on the array substrate, each of the plurality of sub-pixels comprising an organic light-emitting device and a sub-pixel circuit electrically connected with the organic light-emitting device, the organic light-emitting device comprising an anode layer, a light-emitting layer and a cathode layer that are located on the array substrate in turn; and a driving chip; characterized in that: wherein the plurality of sub-pixels are grouped into sub-pixel groups of adjacent sub-pixels, each sub-pixel group comprising at least two sub-pixels, wherein the cathode layers of different sub-pixel groups serve as self-capacitance touch electrodes and are independent of one another; and wherein the driving chip is configured to output signals to signal terminals (Scan1, Scan2, Vint, Data, EM, VDD) of each sub-pixel circuit and to the cathode layer of each sub-pixel group, wherein each of the signals output in a touch scanning phase is a superposition of the signal output in a phase immediately preceding the touch scanning phase with a touch scanning signal to be applied to the cathode layers for self-capacitance touch detection such that each sub-pixel circuit operates in the touch scanning phase in the same state as in the phase immediately preceding the touch scanning phase. wherein the plurality of sub-pixels are grouped into sub-pixel groups of adjacent sub-pixels, each sub-pixel group comprising at least two sub-pixels, wherein the cathode layers of different sub-pixel groups serve as self-capacitance touch electrodes and are independent of one another; and wherein the driving chip is configured to output signals to signal terminals (Scan1, Scan2, Vint, Data, EM, VDD) of each sub-pixel circuit and to the cathode layer of each sub-pixel group, wherein each of the signals output in a touch scanning phase is a superposition of the signal output in a phase immediately preceding the touch scanning phase with a touch scanning signal to be applied to the cathode layers for self-capacitance touch detection such that each sub-pixel circuit operates in the touch scanning phase in the same state as in the phase immediately preceding the touch scanning phase.