Hi Yaiko, it's me, Sherman :)

I will re-write each sentence twice: first trying to keep your sentence structure, and second re-written to sound more native-like. The grammar of both sentences is correct, but the second sentence sounds better.

There always be lots of failure experience in daily life.

There are always lots of failure experiences in daily life.

Daily life is full of experiences of failure.

Since becoming minister of learning department.There were problems more or less in events I responsible for.

Since becoming the Minister of the Learning Department, there are problems in events I am more or less responsible for.

Since becoming the Minister of the Learning Department, I am more or less responsible for problems that occur.

Although the problems are not worth mentioning in the eyes of audiences' ,I know the effect of activities were always be affected.

Although these problems are not worth mentioning to this audience, I know these activities will always have an effect.

Although these problems may not seem worth mentioning, they nevertheless have an effect.

Constantly sum up experience,details determine success or failure.

To constantly sum up experience and details determines success or failure.

Success or failure is determined by constant attention to details and learning from experience.