Abstract: An image sensor chip with depth information is provided. The image sensor chip includes an SPAD array, a time-to-digital converter module, a storage circuit, and a data processing circuit. The SPAD array includes a plurality of image sensor units, and each of the image sensor units includes a plurality of SPAD units and a decision circuit, wherein each of the SPAD units outputs a photon detection result within a scan period, and the decision circuit generates an image-sensing signal based on the photon detection results. The time-to-digital converter module generates a plurality of first time data in response to the image-sensing signals. The storage circuit stores the first time data temporarily. The data processing unit reads the first time data from the storage circuit and generates a plurality of second time data in response to the first time data.