A pixel circuit, comprising: a light emitting device having a first terminal and a second terminal; a charging module having a first terminal, a second terminal and a control terminal; a driving module having an input terminal, an output terminal and a control terminal; a testing module having a first terminal, a second terminal, a third terminal, a fourth terminal, a fifth terminal and a control terminal; the first terminal of the charging module is connected to a data signal (Data), the control terminal of the charging module is connected to a scan signal (Gate), and the second terminal of the charging module is connected to the first terminal and the third terminal of the testing module respectively; the control terminal of the driving module is connected to a fourth terminal of the testing module, the input terminal of the driving module is connected to a first reference signal, and the output terminal of the driving module is connected to the first terminal of the light emitting device; and the control terminal of the testing module is connected to a test signal (Test), the second terminal of the testing module is connected to the second terminal of the light emitting device, and the fifth terminal of the testing module is connected to a second reference signal, wherein the testing signal (TEST) is configured to provide switching between a displaying period of time and a testing period of time, characterized in that: the testing module is configured, during the displaying period of time, to connect the second terminal of the charging module with the control terminal of the driving module, and to connect the second reference signal with the second terminal of the light emitting device, so that the charging module provides a driving voltage signal to the driving module under the control of the scan signal (Gate), and the driving module drives the light emitting device to emit light under the control of the driving voltage signal, and the testing module is configured to, during the testing period of time, connect the second terminal of the light emitting device with the second terminal of the charging module, so that the charging module outputs a current signal of the light emitting device to the first terminal of the charging module under the control of the scan signal (Gate). a light emitting device having a first terminal and a second terminal; a charging module having a first terminal, a second terminal and a control terminal; a driving module having an input terminal, an output terminal and a control terminal; a testing module having a first terminal, a second terminal, a third terminal, a fourth terminal, a fifth terminal and a control terminal; the first terminal of the charging module is connected to a data signal (Data), the control terminal of the charging module is connected to a scan signal (Gate), and the second terminal of the charging module is connected to the first terminal and the third terminal of the testing module respectively; the control terminal of the driving module is connected to a fourth terminal of the testing module, the input terminal of the driving module is connected to a first reference signal, and the output terminal of the driving module is connected to the first terminal of the light emitting device; and the control terminal of the testing module is connected to a test signal (Test), the second terminal of the testing module is connected to the second terminal of the light emitting device, and the fifth terminal of the testing module is connected to a second reference signal, wherein the testing signal (TEST) is configured to provide switching between a displaying period of time and a testing period of time, characterized in that: the testing module is configured, during the displaying period of time, to connect the second terminal of the charging module with the control terminal of the driving module, and to connect the second reference signal with the second terminal of the light emitting device, so that the charging module provides a driving voltage signal to the driving module under the control of the scan signal (Gate), and the driving module drives the light emitting device to emit light under the control of the driving voltage signal, and the testing module is configured to, during the testing period of time, connect the second terminal of the light emitting device with the second terminal of the charging module, so that the charging module outputs a current signal of the light emitting device to the first terminal of the charging module under the control of the scan signal (Gate). the testing module is configured, during the displaying period of time, to connect the second terminal of the charging module with the control terminal of the driving module, and to connect the second reference signal with the second terminal of the light emitting device, so that the charging module provides a driving voltage signal to the driving module under the control of the scan signal (Gate), and the driving module drives the light emitting device to emit light under the control of the driving voltage signal, and the testing module is configured to, during the testing period of time, connect the second terminal of the light emitting device with the second terminal of the charging module, so that the charging module outputs a current signal of the light emitting device to the first terminal of the charging module under the control of the scan signal (Gate).