diff --git a/en/device-dev/driver/driver-platform-dac-des.md b/en/device-dev/driver/driver-platform-dac-des.md
index fcd772ef797ff44ab221f07f46ca0f525313d148..2d5a1efc59fc2bc4b2a666bf49bbb9d0f8e03634 100644
--- a/en/device-dev/driver/driver-platform-dac-des.md
+++ b/en/device-dev/driver/driver-platform-dac-des.md
@@ -46,7 +46,7 @@ The DAC module is divided into the following layers:
 
 **Figure 1** Unified service mode
 
-![Unified service mode](figures/Unified_service_mode.png "DAC unified service mode")
+![Unified service mode](figures/unified_service_mode.png "DAC unified service mode")
 
 ### Constraints
 
@@ -74,8 +74,9 @@ The table below describes the APIs of the DAC module. For more details, see API
 
 The figure below illustrates the process of using a DAC device.
 
-**Figure 2** Process of using a DAC device 
-![Process of using a DAC](figures/process_of_using_DAC.png "Process of using a DAC")
+**Figure 2** Process of using a DAC device
+ 
+![Process of using a DAC](figures/process_of_using_DAC.png"Process of using a DAC")
 
 #### Opening a DAC Device